It would be good for diversity's sake that there be more diversity in non-UUs. Its perplexing why ME, Asian, and American civs build knights and other Euro units instead of units that would fit in that culture group. I know that the PTW Japanese units could be used for general Asian units, but it would be nice if the same were done for the ME and American civs. Unit names should also differ between culture groups as well. But this brings back the issue that Asian and ME civs should have another name for cathedrals and such buildings.