I've not been in a battle at one yet, but voted no for the following reasons:
I think it will make enemy forts a lot harder to capture and hold. I would be concerned that players under the effect of DoTs, or hit by ranged from the battlements would simply be able to run straight back to the save, causing the attacker to be penalised in the same way as they are now for save camping. Both these consequences risk shifting the fights to the castle or other fort.
The old locations of the saves look bare. I'd at least like to see a destroyed altar, or some other form of eye candy. The tents are too small!
EDIT: I like Aries' post about being able to choose which save to resurrect to.
EDIT2: lol... just read the changelog that Zombrex posted...
http://regnumonline.com.ar/forum/showthread.php?t=77307
That seems to addresses a number of my concerns, but creates some others! It wouldn't have changed my vote though!