RE: Can you answer this?
Really... what happens with one model is not guaranteed to happen with another on loss of rudder. The rest of the aircraft design makes a difference.
A minor warp in the fuselage which was trimmed for with rudder could be a disaster if the rudder clevice breaks.
Most 4-channel aircraft, if you get in a spin and don't have rudder control... its game over.
To aid in evaluating why a model crashed we really needed to know more of what was going on with the model that crashed... not be speculating about which result could happen from one clevice breaking.
It is VERY possible that your clevice popped free and that it caused the crash.
A) the plane did respond to throttle command before the crash, so the radio was working.
B) clevices rarely pop free in crashes... more often the control horn is ripped out of the rudder or the pushrod bends. (or breaks)
C) a short radio hit would almost certainly allow reganing control before it hit if he had time to regain throttle control.
D) a short durration rudder flutter can pull the fin and stab off of some aircraft. (game over)