I don't know... Overall sounds good but I have few concerns.
The UI they showed looks baren. UnitFrame for player/target was horrible, and new place for spells didn't changed much. I don't know if they are changing also character panel where we have items, buffs and debuffs and so on. So I guess we will see.
The new talent trees. They showed some images where like 80% of talents were already picked. So where is the customization when you get all of them either way? What is there to customize?
Either way, there is not much info yet. I'm not yet sold on that.