delericho
Legend
I think the core question here is
'Do you want effects that bypass the hit point mechanic for ending a fight?'
There's a lot of truth in that. At one point, I posited a "Resilience" system that was basically a magical analogue to Hit Points. Under that system, effects like Charm, Petrification, and so on gradually whittled your Resilience down (as weapon attacks effect hit points). When you hit 0 Resilience, you're dominated, or petrified, or whatever.
Adopting such a situation would eliminate the "all or nothing" effect of many high-level 3e death spells, and would also eliminate the "save or suck" effect - a failed save might impose a 1-round penalty, but the major effect would be the loss of Resilience. And although it would indeed suck being dropped to 0 Resilience, it would suck no more than being reduced to 0 hit points, and that's pretty much a sacred cow.

Not sure if that's a bridge too far, though. Or indeed if it's too complex to keep track of two pools.
What about allowing a save every other round for really nasty effects
That would work, although it might prove a hassle tracking whether you're on a 'save' or 'no save' round.
