ToME: the Tales of Maj'Eyal

make effect resistance change duration of applied effect, instead of affecting chance of applying it.
so when stunning char with 50% stun resistance stun will always land, but last only half duration.
this would make resistances below 100% much more reliable, without changing their overall effectiveness.

talents like dirty fighting could also be changed to return part of turn equal to enemy stun resistance percentage.

This is what my addon (here http://forums.te4.org/viewtopic.php?f=50&t=38342 ) tries to do, though there is some randomness - so you have a resist% of EACH turn being negated, it doesn't automatically shorten duration by %.
I do think that after some fixing/uploading it would be nice if that went into the main game...

Kind of clashes with existing effect duration reduction effects though.

HousePet wrote:Kind of clashes with existing effect duration reduction effects though.

Yes, of course - they would have to rebalanced. Using my system, they could still be 'different' by granting an AUTOMATIC reduction(not rolled).