Way to apply Inner / Outer Box avatar collisions

As a Roblox developer, it is currently too hard to fix character’s collision while using custom player appearance scripts.

When I update player’s head to Rthro, the size changes significantly - even with Inner Box on.
Sure, I don’t know if that’s a glitch or not. Still, I want to have checks.

I want to have absolute control over player’s hitboxes.
Changing / checking them on the go would be really useful.

If Roblox is able to address the issue, it would save us a lot of time.