Greetings!
I have noticed that Wowhead has done a sterling job, their model viewer now has updated models and colour variants for Ashbringer! (The flame-touched variants seem bugged at this time to me)
Here is the link: http://legion.wowhead.com/artifact-calc#AkAwECA
(Scroll down, click on Appearances and view away!)
What do you guys think of the variants/colours now you can inspect them a bit closer? I'm loving the standard variants, but the purified and shattered variants also look amazing too! Really not keen on the shadowfallen colours