Mappers put the type of sky they want in for a reason, and have the style they think fits their map best. Airtime's highdark for example. Changing skys ruins that. Might as well say: Mappers can only use bright skys, that way even newbies would have the advantage.
Just like the crosshair exploit, it's not needed, it gave an advantage, it got removed. Everyone could of found out about it, just like they could find out about skys, but it gives advantages to those who know about it to those who don't. Sure everyone might find out over time, but why not just make sure everyone having the same advantages/disadvantages by just not having the ability to change that stuff. [I bet some people reading this wont know what the crosshair exploit was, and it was around for a build or two]
Reaver, you're in your own world on this, nobody agrees with you yet even on IRC you still try to prove a point which you have no logic towards. It's not needed, nor wanted.