So what's the deal with Karthus?
He seems pretty unplayable... he takes way too long to scale up, all his spells feel useless aside from his ult, which has one of (if not the) longest cooldown of any spell. He doesn't fulfill his role of doing massive damage unless you get to full build. He doesn't deliver on his fantasy of being a sinister, yet charming Grim Reaper. He doesn't feel powerful. It just feels like a joke when I play him and everyone else is dashing circles around me and I can't do a thing.
Riot hasn't said anything about him since they butchered his Wall of Pain. Why is he in the gutter? Why wasn't he included in the mage update? Would he really be that awful to play against if he was viable? Is his design flawed? Is that why they're keeping him down?