Ya, that would work just fine as well. Especially since corpse decay timers are coded into the source depending on mob level. I would love to see a rule to set that.
I also wouldn't mind an option to be able to adjust decay timers depending on the zone. One example where I would use this would be a zone I made purely for people to exp and AA in where the mobs have no loot. They AE alot in there, so it would be nice if the corpses just poofed right away for less load on the players and probably on the server as well. I am sure there are other cases where this might be useful as well. But, I think the most important part is corpse lockout. If it was adjustable or if there was a way for players to unlock them, then the non-functional raid system wouldn't be so bad. Though, I would love to just see raid working