In Divine Divinity teleporting away from a dangerous situation and then coming back after a sleep ... he enemies have back full HP.
I hope the same is true for D:OS because otherwise it can become too easy ! No ?
Same, i hope it will at least be like this but i'd prefer that once you're in combat you have to successfully flee before you can teleport away... but even then with two characters you could probably leave one stuck in combat just waiting for the other character to flee, teleport away, have a power nap, heal and restore, grab a load of potions, maybe some scrolls/traps, a can of Redbull and then teleport back to the battle.
Personally i think there needs to be some other level of control to prevent this sort of thing. You could potentially:
*) Once both characters are in combat, both must successfully flee before they can teleport (but this doesn't prevent one character just running to the nearest town and doing the same thing)
*) If both characters are in combat and one leaves... they have to wait till the fight is over. Not much fun in multiplayer!
The problem is that solutions like this seem arbitrary.