(Yes, this is a Necro. I always meant to come back to this thread, but got so busy in August that I never made it:-))
I've come into agreement that there's probably some form of compounding going on with the Bands. I don't think we have all the info on nicrosil yet, but there is probably some funkiness going on there. Now, I still think that Kelsier is far more powerful now than he was during era one.
I would like to discuss what people think is the possibility of him having gained feruchemy. And how powerful could he be? Twice as powerful as Elend?