well i would like humanoid enemies to not be suicidal blood knights and know when a fight is hopeless. given the nature of dungeons, i think surrender would work much better than fleeing so they dont "aggro" everything they run by, though i dont think it would be terribly difficult to script them to just... not aggro when fleeing. enemies ALREADY surrender, its just that i guess bethesda never finished that mechanic so they just get up and attack you again.
I think an actual surrender option, and not just submit, might actually be really cool. So long as they knew they had to fork over the loot in the process.
It'd be an easy way to allow players to choose how they want to respond to a situation.
Maybe a bandit leader surrenders after giving you one helleva fight, you could allow him to leave with his sword, send him packing down the road in his bday suit, or just chop his head off depending on what sort of joe you are.
I NOT talking about a morality based dialogue option either, once they threw in the towel, you could just put away your weapon and "speak" to them and have access to their inventory.