These guys are pretty tough, and yet when you kill one you actually wind up with them splitting to fight a bunch of lower CR oozes. The way xp gets figured, you wind up with maybe 1 xp for a creature that honestly is tougher to fight than a normal Bioware ogre.
I just went through the ooze quest, got far worse xp than on the ogre quest and I've got to say my ass got handed to me a few times for a really low xp/kill ration. Died once, and almost went out twice more and got a grand total of 340 xp most from ending the quest.
I'd think it'd be a good idea to ensure you get the proper CR xp when you take out the splitting oozes especially.