If you use the inverted Gapps, then MMS will work.
I've been using GoSMS and its working. I don't want to use the inverted Gapps because I don't like the theme. What I don't understand is that the inverted Gapps are just suppose to be a re-themeing of the regular apps. So why do they work and the standard colors don't? If the inverted ones work and the regular ones don't work then the inverted apps are different in some way other than colors.
I had some Google apps force closing too, but I don't use them so I just un-installed/disabled them. My data problem seems to be gone also. The 4.2 camera and gallery is awesome. The 4.2 gallery force closes if you use any kind of theme though.