One thing that I found odd is that most of the time we're shown that kryptonite renders Clark beyond powerless. More often than not all he can do is huddle on the floor like a baby missing its binky while writhing in pain. We've been shown he pretty much has none of his powers including his invulnerability or even the power of any real thought. But this time around he can use his X-Ray vision?
That doesn't seem to wash.
Last week he used his super breath under Kryptonite
In Superman Returns he flew a whole island into space that was laced with Kryptonite
this is not the first time Superman has used his powers under Kryptonite, saw it lots in the cartoons too