Can we disconnect some of Skarner's bonus movement speed from his shield?
Once you knock out Skarner's shield, he basically has no mobility if he hasn't gotten any Crystal Slash stacks, so he's left screwed. I think some of the MS bonus he gets from Crystalline Exoskeleton should not depend on whether or not his shield is up. Not a lot of the bonus, but just a little bit. This way, Skarner isn't completely neutered once his easily-destroyed shield breaks.