I use "Perfect Keyboard", very small, fast, and customisable, you can delete the original and save a lot of space (if you don't need spell checking and stuff) B-)
Also, you can use "Lightning Launcher" which takes up about 300 KB and delete Trebuchet :D It's highly customisable/fast :)
The only thing I would like to have is patched Google Play Store that won't periodically update itself to newer version.
Clean install, I don't know why this happens, I've tried it again and it's the same. 200MB system. If everyone else is ok, then I'm doing something wrong, I'll download the files again, maybe my gapp zip got corrupted!