MJ,
It seems you have seriously misunderstood the dynamics of the situation.
The rudder is there to maintain directional control (secondary effect, yaw).
The ailerons controls roll (secondary effect, roll).
In the 'max power below Vmca' case it is the roll which is uncontrollable.
Gliding relevance? Well, apart from that I have yet to fly a type which doesn't fly the same way, not banking more than 5 degrees brings you closer to a more critical situation.
Dirk,
I suggest it is just loss of control. May also result in stall or spin of course.