I could be wrong, but I haven't seen it suggested elsewhere, so here goes...
It would be super nice to have the ability to color-code the game's given clothes.
For instance: I'm now wearing the Halloween dress in black. I'd love to see it in a dark burgundy.
If everybody looked the same...
We'd get tired of looking at each other...
This way we could seriously personalise our looks without putting too much strain on the art department.
Meaning: the same number of clothes would be in circulation, but still we could all make em look different.
With the same item one could go for a fluo/rave version while another would go dark/gloomy etc.