Originally posted by DonJuanDoja:

Yea we needs lots of building pieces, wouldn't count on anything tho.

The devs favorite thing to do is restrict the player, wouldn't surprise me if they thought having too much roof selection would make the game "too easy".

I think its more that they dont want to convolute the build menu as much as possible. Less is more in a lot of cases, and that applies to having bloated UI's.