Biggest, biggest issue that dominates every issue in The Force Awakens--make it not so "safe". And by safe, I mean don't just make A New Hope all over again. The "girl abandoned on desert planet", I'll go along with, the cantina scene knockoff, I'll go along with, but at some point, you aren't just referencing the original film but completely ripping it off. When you make a blatant ripoff of the Death Star and then play it up to be some huge threat and then deal with in exactly the same way (well, fusing the Death Star interior scenes and trench run scenes) in far inferior way (what a near-complete lack of tension the "trench run" had in The Force Awakens compared to the original!), you are going to have a huge flop on your hands.
I was going along with the movie, ignoring its flaws, until the final third of it. There really was something
there, but when you tie everything together so poorly, you're left with a lot of disappointment.
Give it a better sense of passage of time, especially between hyperspace jumps.
The editing of that final jump with Rey going to the island planet was silly.
More silliness was them watching the republic capital blow up. Where exactly is the that planet? Just blow it up, and make the force sensitives feel it.
Yeah, that was quite the missed opportunity that seems especially odd. You would've thought it was Coruscant if not for a single, easily missable line of dialogue I didn't even notice until I saw it the second time. I'm going to ignore the "hyperspace superlaser" thing because it is science fiction, after all.
The other KEY flaw would be the "power levels". Even if Rey is supposed to ultra-elite, the film does a terrible job of showing why she should be able to beat a trained force-wielder like Kylo Ren. The battle should be basically one-sided, going by what the film had shown. But this supposedly "elite but not fully trained" warrior like Kylo Ren loses badly to a stormtrooper (who may or not be force-sensitive, but got his ass kicked by "TR8R" earlier) and someone who has barely even picked up a lightsaber before. The supporting material gives reasons as to why they won, but that should be the film's job in showing that! Instead all you see is Kylo Ren hitting his stomach and blood dripping because of Chewbacca's bowcaster shot from earlier,
very ambiguous for something that should be important. And after all, it isn't like wounds mean everything when going up against apparently untrained foes.
It shouldn't really be too hard to make The Force Awakens better.