This would add a lot of complexity to the tool as far as entity selection goes. Perhaps random pattern generation could be a thing. Random rotations is a thing, and so is random positions- but it's disabled(the convar is still in the console. Look for a convar called egs_ss_noise or something). The reason is because there's no cheap way to do collision detection so the entities don't spawn inside eachother. Random skins could also be a thing.

Great suggestion.