I'm not that pissed off that Mwu "came back to life" in GSD. However, they could have pulled it off more decently by having him face off with the crew members of the Archangel and Murrue, rather than magically becoming Mwu again and doesn't even suffer from any side effects of the brain washing process.

I wanna see Murrue confront Mwu, and perhaps dying to save the AA (for real this time) when he regains his memory while piloting a Gundam (not Akatsuki!). I'd wish that GSD would start all over again and make all the wrong things right. But well, it had it's moments, just not as good as Seed.