I couldn't possibly comment but I'll have a go anyway.
Any aircraft will have an envelope which it is dangerous to be outside (even if you feel you can fly well beyond it in terms of your own abilities)
Jack stall is easy to encounter during manouvering such as quick stops where the blades decellerate the aircraft rapidly against the air mass, jack stall in this situation will cause loss of tail rotor authority,
In the same way you can over torque, you can jack-stall.
good pilots know the limits of their aircraft and will fly accordingly.
That said I have no problem with manf's fitting more powerful actuators.
I have rarely heard a discussion such as this that does not relate to EC350/355