Ok that's the point.
1-I don't know about CM 7.2 USB Mass Storage. I never had those problems with it.
2-USB Mass Storage works on CM9/10.1/10.2/11 (I don't know anything about CM10).
3- For me the best ROM that I ever seen is CM9.2 . But if you don't like that UI, you can change to CM10.1 (Really stable). Obviously also the CM11 is stable but not as CM10.1
4- So..Best Performance = CM9; Best UI and performance (Between CM10/10.1/11) = CM10.1
Hope I help ya
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