If i have the time to flash today, i'll give it a shot. To be honest, i'm almost ready to just wait it out, until theres a release of cm9.on 3/14 and done the LTE to 3G switch 4 times this morning without issue.
I have yet to test WIFI to LTE or 3G yet, as I don't have WIFI to test. Maybe someone else can confirm this, but looks like the 3G to LTE hand off has been solved!! Awesome!!