The 0309 build follows CM11 in its radio switching behavior, it seems to me. Not as good as it was a before IMO. Slow to connect and switch. Voice is slow to stay connected, which is strange. Go to the about phone / status screen to see how it does for you.
I never got LTE or eHRPD, but I did get 3g EVDO eventually. But again, I am not sure about the towers in my area.
I was connected to LTE today using LiquidSmooth 3.0
I hope it gets better.
I might do a clean flash on it tomorrow when I am near stable LTE to see what it does.