I tested it out today. while looking at the rotor RPM, there's a direct correlation between reduction in rotor RPM and the degree of collective being raised. At collective lowered to flat pitch, the rotor RPM is within normal limits, but of course there is no lift. at middle ranged collective, the RPM drops to the lower limit, but doesn't produce enough lift to hover. full collective creates enough lift lift off, but the rotors immediately drop to well below limits, causing the aircraft to drop. It's not even like there's no governor, it's actually more like the engine is at idle.

Also, there still isn't any explanation for the drop in rotor RPM as a result of forward cyclic. As far as my knowledge of helicopters and aerodynamics goes, this will never happen in real life. I'm aware of transient torque, but that only increases torque during left banks, which could result in a drop in rotor RPM.