If the textures are world-space'd already try changing them to world-cubic, that might help with the texture scrunching on the roof.

I'd also group the city-blocks and rotate the whole town to see if that helps break up the repetativismishnicity (if I'm going to slaughter a word, It's staying dead!)i.e. the buildings all line up right down the center of the picture.

Moongoat, click once, then wait. And the plural of roof is roofii (perhaps roof-roof)