EDIT: fmalover, I totally see your POV, and it does worry me that JJ won’t conclude certain character arcs properly, but hopefully he’ll surprise us, or they already have the broad strokes mapped out, or Chris Terrio will help keep it interesting.
Well, the one arc I fully expect Abrams to conclude is the Kylo Ren/Hux rivalry, which Ran Johnson carried over to TLJ, and the final shot of Hux makes it clear he resents Kylo as Supreme Leader, a title he considers to be rightfully his.