I didn't think Luthor worked in this movie at all. I did not get his motivation, did not get why he was doing most of the things he was doing other than he was crazy and evil. And the performance was just annoying to me. I'm all for trying new things with this stuff and I have to give them credit for thinking outside the box but it didn't feel like Luthor or even a particularly compelling character. It felt more like the Joker with the random acts of destruction and the, uh, hyperactivity. And the allusions to Darkseid were tacked on and didn't need to be there.
I really missed the suave, deceptive Lex who could appear as a political and economic leader while still being consumed with jealously and egomania. One whose history with Clark and kryptonite (his head being shaved in prison was lame) leads him naturally towards villainy.