I think there should be a thing in the wardrobe where you could draw ur own clothes and hair. Also there could be a thing where u could put ur pet standing nxt 2 ur avatar

, not only that, but art would be SO inconsistent if people could draw their own clothes... and I know that for quite some time, Subeta has strived for thoroughly-consistent artwork.

If you want to draw your own clothes, there's always custom edits of HAs.