– Currently it would put a huge strain on the systems, both servers and local storage, since each building would have two faces. So a approximate double up on Building Graphics for up to 10 million users world wide. (As mentioned above in the thread, this I not 3D, but based on Flash and next to be based on HTML5).
Not to forget that every single building in the game would have to be reworked – That is a lot of work.
– FoE is free game... The about most important intent to use money on the game is to expand the space available – the limitations or challenges on how buildings fit together is a essential part of how this can remain a free game.