Oddly enough, I never really felt any sort of tug or pull to see Finn and Rey reunite. Call me crazy, I love them together, they're great, but I also really loved Rose just being a rando who got swept up in the legend. Her non Force view of being one of the little people of the galaxy, as well as the resistance, shines through the whole movie and ties things together, mostly because of two things: the kids in casino town (the force user kid especially who felt an affinity for the animals and was clearly defending them with his friends) and Rey discovering that her parents were nobodies who probably just left her behind (even if that ultimately ends up not being the case).
If the movie had Rose as just some rando and her themes didn't tie into any of the other themes, she would have fallen flat, but with her connection to the children and also to Rey in the same way, she becomes a really great part of the movie and the new era of the story we find ourselves in. You don't have to have special blood to be a hero, you just have to want to be a hero and chase after it.
The disbanding of the old jedi ways also ties into this because it takes away all of that nonsense about midichlorians and being the chosen one and a prophecy to balance the force, on top of simply saying, "Let the Force be what it is, let it flow through you, accept it, if you need it, you'll have the strength necessary to overcome evil." Instead of relying on ancient Jedi wisdom or making the Force "grey" like everyone thought would happen, we get more of a "grey" idea that the light side is good, the dark side is bad, but why does that have to be all that important? Why does it need to have this overwhelming weight to it that it always did?
It doesn't fundamentally change what we know of the Force, there still is the light and the dark and there always will be, but it helps force users (and the audience to an extent) to understand that you don't need the hokey religion side of things to be an element of what the Jedi and Sith are. Force users can be anyone. Heroes can come from anywhere and even if you come from a long line of heroes, you can also turn to the dark side. Nothing is set in stone. Yes, Anakin balanced the Force by killing Palpatine, but it didn't go the way the Jedi thought it would at all. The Old Jedi Order was burned away, leaving only Obi-Wan and Yoda, with Luke in the middle next to Vader and Palpatine. With four out of five of these people gone, leaving only Luke as the Last Jedi, you can see that split shown very clearly. Luke is just a guy, he was just a farmhand. He wasn't destined to do anything great, but he ended up doing it anyway.
And then he failed after that. He tried to rebuild the jedi, tried to do something he shouldn't. Then he saw the dark side, conflict, growing within his nephew and like any human being who can see true evil, he himself became conflicted. Standing over Ben and accidentally turning on his lightsaber? That wasn't a failure of the Force or the Jedi teachings, it was the failure of an old man, a normal man who let his instincts control him for a millisecond that changed the course of history.
Seeing the tree burn down as a symbolic gesture of Yoda agreeing with this idea, that the Jedi can be more than what they were when they were destroyed by embracing their humanity, helps tie the entire movie together in a great way. Rose connects to the kids, the kids connect to Rey, Rey connects to Luke, Luke connects to the Jedi teachings, the teachings connect to the true nature of the Force and now our new perspective on something we've always "known" as an audience, and that new perspective connects to how we view who each of these characters are and what they can or will do and have done.
Kylo, for example, and Snoke's ultimate failure. The two of them are the true Last vestiges of that old way of seeing the Force, that it's this overwhelming power that gives someone an ultimate destiny no matter how hard you might fight against it. Kylo made the decision to kill Han, but he didn't kill his mother. He killed Snoke, but also tried to kill Rey and Luke. He's in a bit of both worlds, but Snoke thought he could control Kylo, that Kylo was powerful because of his blood, like Anakin before him. By being unable to see that Kylo could very easily betray him and even failing to literally see the betrayal happening right in front of his eyes, Snoke showed how stuck he was in the old way of seeing the force, just like the Jedi were before Vader/Palpatine killed them all.
This is a long post so I'll stop waxing poetic, but in closing, I wanna say I like this change. The Jedi aren't ever going to die, but allowing the past to be burnt away in all aspects of the canon is an excellent move. It allows the Jedi to become essentially heroes again, not tied down to politics, religion, or foolish ideology. Fearing the Dark Side and its power is what killed the Old Jedi and Luke's sect of the Old Jedi as well, to put it that way.
By changing the way we see the Force and also figuratively/literally burning away the past, we get a new, fresh take on what Star Wars can be, where it'll go, and who we're allowed to see become important. It's extremely fitting that the Phantom Menace opens with the Skywalker name resting in the hands of one little boy and then in Episode 9, that same name (or blood) is carried on by one young man, potentially the last descendant of Anakin (Leia counts too, sure, but she'll most likely be dead come the opening of the next film, so eh). Sure, Kylo is the Supreme Leader now and has absolutely gone Dark Side almost fully, but he's still carrying the flame that Anakin lit.
It's also interesting to see that Kylo is the one who continually refers to burning the past down, killing it. He takes the same lesson that the audience and Luke learn in this film and warps it, twisting it. It's the same exact lesson and he uses it to destroy Snoke, yes, but as the Dark Side always has, it twists the truth into an angry, bitter version of itself. It's still the truth, but it's wrong in a paradoxical way. Kylo knows he should just become Ben again, he knows he should join Rey, not the other way around. In his mind, he's still the grandson of Darth Vader. He's still meant to finish what Vader started, or so he thinks. He doesn't hate what the Emperor did, he doesn't hate the idea of the Jedi dying completely. He didn't truly learn his lesson of letting the past get burnt away.
In the end, and this is really the end of the post now, the message of this movie in particular, not star wars as a whole, is that you have a past, you have a history, but it shouldn't define you. You can always surpass it. You can always become greater than what came before you, you don't have to hold onto it rigidly and conform to a certain set of ideals. You just have to keep moving forward, live, create, trust yourself, fail, learn from those failures, and never stop because life itself never stops. The Force never stops. The good guys learned this lesson. The bad guys didn't. As complicated as I made this post, I think that's the simplest way to boil down what I've said. It's not about the infinite tug of war between the light and the dark, the jedi and the sith, but in simply being alive and happy, whether you've got the Force or not. Kylo will never be happy until he can give up the things that are forcing him to stay committed to the Dark side and that is what will ultimately end him. His failure to accept his humanity, no matter what magic shit he can do.
In summary, nah, I liked Rose, she was pretty cool. Finn didn't need to be tied to Rey. That's neat.