"While we're excited to share with you our progress on these new models, I do want to stress that the models, textures, and animations are not entirely finished. Bug fixing and iteration can and will occur, and that's where you come in!" writes Blizzard QA on the US and EU forums, soliciting costructive feedback.
MMO Champion has full-size, head-to-toe bikini shots of both the female and male models because of course it does.
Also arriving in update 6.1 are class tweaks, new heirloom gear, garrison expansions, follower mission fixes, and the chance to buy (with gold) those followers you missed while questing. The first iteration of the update landed on the PTR in early January; the patch's launch date on production servers has not been announced.