Isometric Stuff Needs Improvement

[Dread Spectacle]

 Hello All,
I've been working on some isometric buildings and stuff and was wondering if the Critics Lounge might have some ideas on how to improve it as it seems a little bland to me.  So without further ado.

The grass pattern needs some tweaking and I may have gone a little overboard on the dirt on the sidewalk. But I'd like to hear any ideas that other might have. Thanks.