To me, that's the problem. It may not have to be realistic, but a good story still has to obey the laws of the universe in which it takes place. Bringing back Darth Maul after the writer of Episode 1 - you know, a guy named George Lucas - clearly intended Maul to be killed is pretty lame. It makes the whole concept of death in the GFFA a joke. If you can bring back a guy who got chopped in half and fell down that shaft, then you can bring anyone back. Mace Windu? Bring him back! Palpatine? No problem! He landed in an escape pod and escaped the Death Star before it blew up. Tyranus? Just put his head in one of those jars and give him a robot body. Heck, do we really know Anakin died at the end of E6? Maybe Padme is alive too! Perfectly plausible she survived considering that, you know, she wasn't chopped in half.