I completely disagree with your assesment of the UU as a whole and this issue in particular.
Don't take that the wrong way, I'm not trying to start anything, we just have complete opposite views on things here.
Whether or not you or anyone else think that the UU is more "realistic", there is simply no argument for...
The reason why bringing someone back from the dead in the UU (no matter how much the character is missed/loved) is stupid is because each time you do that---you take away just a bit more of the foundation that the UU is built on. It takes it one step further into random 616 madness and continuity errors and just basic "over the topness".