I personally believe this should become an official feature, as UGC creators we could create new categories and genres of items with transparent texture support. The thing with limiteds though is that people have already been uploading limited knock-offs, this isn’t going to be a new problem if they allow us to create transparent UGC. The good that can be done outweighs the bad. With proper moderation in place to take down fake limiteds we can return to a normal state in the Marketplace.
If any staff are reading this, please do discuss alpha support! Hairs could be greatly optimized, faces/makeups could be more accessible and easier to make, new innovative UGC could start new trends. I am currently brainstorming ideas & converting some of my UGCs to alpha (Hairs and makeups) if this feature will be coming in the future. 
Edit: A compromise could be limiting transparent or semi-transparent textures only for Hairs/Face Accessories. (think sunglasses, faces, visors, goggles, decorations etc) I do not believe transparent bundles or layered clothing should be allowed because of expensive rendering & misuse issues until Roblox has found a way to optimize this or has improved their QA Moderation.
