I've been running the mezon bec with the 2s lipo without regulator through a switch to the rx. Haven't had any problems with this setup over 50 flights now.
One big advantage of this setup if you have the telemetry, is you know if the 2s LiPo is charged. With the regulator in the circuit you don't know the state of charge of the 2s unless you go out of your way to measure it. Unfortunately a 2s has too high a voltage for 6 volt servos.
Jim O