Originally Posted by
A Squared
Pitch-locked prop at rotation wouldn't be a that big a deal. A prop malfunction with pitchlock is preferable to the same malfunction without pitchlock. Pitchlock prevents a uncontrolled overspeed and buys you time to get stabilized in the climb at a safe altitude before having to screw around with it. RPM will increase with airspeed, but that can be controlled with throttle reductions. There shouldn't be any aircraft controllability issues unless there's something else going on.
As the airspeed increases, you will have to bring the throttle of the affected engine further and further aft resulting in more rudder required to maintain control.
Not sure if that is considered a controllability issue. But it does have to be dealt with one way or another.