I have tried out retrofw 2.2 and overall think it works great. I have found a few issues if you could look into it for me. Gmu and mxplayer are missing and older versions do not function. games such as powder, and gameblabla's newer port of openjazz no longer function as well. Also, tv out no longer seems to function as well, although i could be doing something wrong.
All in all though, solid release. The system feels snappy, usb connection is solid, most apps and games run great.