There is a passenger rhino too, don't discriminate!
I agree with the GST hat point, but after six years of hats you've got be more lenient on them there's only so many reasonable things they can make and when they've tried to make things completely unique in the past they got backlash and were told to make basic common things.
Hats/mounts are a good source of income, so it makes sense to be creating the types of hats/mounts that are appealing and players will want to buy - especially new players who maybe weren't around for the older version/style if there was one as well as potentially turning older ideas into a more suitable version to fit the new graphics theme Classic has transitioned to.
Things like animal ears become a common trend and something that attracts a good portion of players, why not appeal to that and give them a larger variety which further benefits people who enjoy that style and the server by generating income?
You've got to look at this from a creative and business viewpoint, as well as statistical.