The enormous egos of the System Lords needs a retcon, since it just turned them into incompetent buffoons, and there's nothing so boring as a lame-ass villain.
I'd rewrite them as being still egotistical and having the fashion sense of a Las Vegas drag queen, but a lot better organized and able to work together and therefore more fearsome.
The best villain is the most powerful one, that way the good guys have an interesting challenge and the writers have to work harder to figure out they can win anyway. No more ass saves via C-4, Stargate's answer to technobabble.
And no, I havent seen Iron Sky
yet - is it any good?