But there are two things badly needed that I can think of instead of just one:
1) Mirroring-Mirror items like staircases, buildings, etc so we can use items on both sides of symmetrical maps.

2) Multiple textures for items - In the item settings, allow us to change it's texture as we currently do for colors. Textures like Rock, Stone, Grass, Sky, Cloud, Red, Blue, etc.Think about it. Changing an item's team already changes color elements. Why not add textures to the color change list? Shapes stay the same but at least we can blend objects together IF WE WANT.

Okay, I'm going to bed now so others can post replies. ^_^