I'm a single issue player and this is it. This is the one thing I want enough to bother posting on the forums.
I've wanted customization of human pets since I first started playing. MM is my favorite class.
As they are now, the pets tend to clash with 90% of what I can think of for MM designs/concepts. I have 3 MMs where I designed their costumes around the pets and it's an unhappy compromise that makes me feel stifled even when I pull it off.
I really would just rather have full control of how they look, full stop. Not just colors, not presets, full control. To the point that I'd be playing on TS if it had a substantial playerbase at all, much less an RP community.
If there's a concern about how it will be used, we have moderation tools for people who abuse the creative license they're given--the same tools used for people that post slurs or other rancid behavior. It's not like MM is a wildly popular class either--at most I see, like, 3 at RWZ raids and I'm often the only one at a hami. So this idea that people are just waiting for their big chance to flood the streets with offensive garbage is a little wild to me.
Anyway, that's my two cents. I'd really, really, really, really like this as a feature, even if it's just for human pets.