It dialed down on the power creep we'd gotten in the Old republic and New Republic/NJO eras which is good.
It also erased a shit ton of frankly awful story lines. Everything past the first Zhan trilogy (by in-universe chronology) was basically dogshit sans a few stand-outs like I, Jedi. Draining the swamp (heh) was a good move on Disney's part. They ****ed up by replacing it all with the equally shitty timeline that is the sequel trilogy, but they get points for effort.
I'm actually fairly optimistic about the canon of the series going forward. It's been hard watching them treat the Big Three like shit on screen, but the number of pre-existing characters is growing pretty thin. Once Leia, Chewie and Ghost-Luke are permanently out of the way we'll have an entirely OC cast and Disney's writing is competent enough to handle that.