On the live build, if you're a vampire and equip the mindshriven skin, you get a unique version that displays red eyes.
For those of you who don't have the item. It looks like this:
On PTS, the mindshriven skin completely overwrites the vampire visuals and appears normally. Like this:
I assume this was originally a bug. I'm also willing to bet this is an unintended bugfix, that is somehow connected to the costume overhaul in the DB update.
Ideally, I'd love for there to be some way to have access to both skin options (with the vampirism indicator and without), but I didn't see any mention of this in the patch notes, so if the original effect was intended... then this is a bug.