I noticed during the DawnTrail Benchmark that the ponytail hairstyle on Miqo'te has little holes meant for the races with their ears on the side, while the current in-game version doesn't have that. I haven't noticed it on any of the other hairstyles yet, just this one. Hoping it gets fixed before the expansion actually releases.
(Pictures are unfortunately not working for me, will try to update with them soon.)