I didn't like the look of the warlock tier 6 except for the wings. So at the moment I also don't really like the new version. But I love the t6 priest one and the new version is also looking pretty great. I just hope it's also possible to farm the t20 priest set as a warlock like the recolored t6 priest set.
For the Warlock I like the tier 5 version much better.