Fine.Good idea, but here's the problem:
JJ ABRAMS HAS NO CREATIVITY
But he had the whole EU to steal from if he lacked for ideas! So not only is he lacking in creativity, he's fucking lazy to boot.
The re-emergence of the Empire would have made a lot more sense if they just used the lost Katana fleet from the Thrawn novels.
The galaxy is at peace except for a few systems under First Order control, they have largely been driven to the outer reaches of the galaxy ....which is exactly where they accidentally stumble across the 200 dreadnoughts of the lost Katana fleet, that puts them back in the game and gives them the ability to launch a devestating surprise attack on the New Republics centers of power with powerful weapons that nobody knew they had.
You know how TFA crawl should have started?Luke, on the other hand, is a completely different story. He is on ach-to, for no real reason, other than self-exile waiting to die. If there is one defining characteristic of Luke: it his determination/perseverance. That is completely abandoned, to the point, he serves no real function to the story. They couldn't even be bothered to write, in the context, of his character.....
Ben Solo is missing!....
You wouldn't have to change much more then the dynamic to rescue a coherent story from that mess.
Luke and star pupil Ben have found the first Jedi temple on Ach-to, which is a nexus point of the force, both dark and light in the same place as represented by the pit and the tree.
Make Ben secretly conflicted about his heritage, worried about the taint of the dark side in his family history rather then enamored by it, causing him to make a fatal mistake in his effort to know once and for all if the Dark side had a grip on him.
Just like Luke on Degobah (another less powerful nexus point of the force) he is drawn to test his ability in 'the dark place', and like Luke he fails spectacularly.
Instead of facing the Dark Side in the pit, he encounters Palpatine's force ghost instead. Because of the nature of the place Palpatine's force ghost is extremely powerful and capable of effecting the physical world (would also explain Yoda and the lightning at the tree, it's literally the only place that can happen) and he 'inhabits' Ben's mind and flees to the First Order leaving Luke desperately studying the Jedi texts in the hope of learning some way to bring his nephew back.