What I heard so far meets my expectations, except for more fucking followers, I hope it's a click and forget or completely skippable thing.
I don't really care enough about the demon hunter, but I like other things I heard, such as the 3 specs for hunters being totally different, if they do the same for rogues, mages and warlocks, I'll send them a couple of beers.
I'll pick a main class later on, right now I fear half of these announced features are going to be cut before the launch. I'm going to play what will seem more fun once class changes are fully revelead, maybe the hunter which is getting my attention once again (beastlord ftw).
Lore wise it's interesting, a lot of stuff compressed in a few zones and raids, but better than never seeing the end of the plots. Thumb up for me, except for the release date, which is going to be sometimes in 2016 probably.
I'll probably sub a month to fix a bunch of stuff, finish things I want to finish and get some old raids completed.
Raids: if I can do them once only for lore/quest/artifact purpose and then grind 5-men, they'll have my heart back. For real. Meanwhile I'll finish exploring Eorzea