Are you using the autopilot at all? It is currently not working properly and they are working on a fix. Asking it to control altitude is causing a dramatic nose up pitch until it stalls.
I have found recently the phugoid oscillation (how much the nose goes up and down before settling, after the pilot makes a power/pitch change) to be rather sensitive and if the turbulence setting in the sim is set to anything but "low" it pitches up and down so much I can't really take my hands off the yoke.
I can't say I have experienced the violent jerks you are describing though.