1) It definitely seemed like the Republic and the Resistance were two separate entities.
And also, that the First Order destroyed the Republic with one strike of the weapon (star killer?). That scene where those on Coruscant looked up, saw the ball of fire approaching, and then planets were destroyed. Was that the end of the New Republic?
And why was the resistance (run by Leia) separate from the Republic?
2) I think it was clear from early on that Han was going to be killed. For one thing, Harrison Ford has indicated he wasn't going to or didn't want to be in future films. He had a big role in this one (unlike Leia, who was mostly a cameo), but they are also moving away from old heroes to new heroes. Ben Solo - aka Kylo Ren - was a reasonable name, though a part of me was hoping they would name him Jacen, as tribute to the now non-canon star wars universe. At one point, I definitely thought Rey was going to be his twin (like Jaina and Jacen, Luke and leia), and it seems like she is related to SOMEONE - maybe Luke's daughter?
3) The line from the teaser "my father had it ... you have that power as well" was never stated in the movie, which means it might be a line never said (the first part of the line was from RotJ, but the last wasn't) and just added for teaser ness, or it might be a line from Episode 8, which comes out in two years. The fact that Luke doesn't show up until the last minute of the movie certainly indicates he will have a bigger role in the next film
4) Biggest Criticism: Okay, Rey was pretty awesome, but there is something about suddenly having and being able to use the Force with such skill. She was able to fight and defeat Kylo Ren (who we know is still alive, albeit injured), even though she had no training whatsoever. She was able to manipulate a guard into releasing her, even though we have no indication she even knew a jedi could do that, or even knew that she had that power at that point.
By comparison, Luke couldn't beat Darth Vader in Empire, even though he had started receiving training. And Finn, despite being a hero, should have been torn to pieces when fighting Kylo Ren, but he managed to hold his own. That shouldn't have been possible.
5) The battle to destroy the star killer weapon was kind of besides the point for me - no main characters in the space battle, and we cared more about Han, Rey, and Finn at that point. We also easily knew how the battle would end.
6) Really liked Finn's character. Really liked Rey's character. Really liked BB-8. Also, really enjoyed Lupitya N'Yong's (sp?) character, the one that gave luke's first lightsaber to Rey/Finn.
BTW, how did she get that saber? didn't it fall at Cloud City, along with Luke's hand? THAT, btw, is why I think Rey might be Luke's daughter - she was told it was passed from Anakin to Luke to her. BUT then again, Rey remebered her parents leaving her on Jakku, unless those weren't her real parents.
So many unanswered questions.