Mordekaiser feels good. REALLY good.
Mordekaiser is Viable, he can be taken top-lane and my dog came back to life. Seriously I'm so happy with the change to W, and the plays, THE PLAYS. For a champ that is so slow, that sudden boost of speed from a minion is perfect for getting back to lane, a surprise juke, or even throwing off your opponents sense of safety as you love tap him with Q for half their health.
The changes to the ult are NOT a nerf, the switch to 75% DoT vs the 50% means your ult now out-damages potions. Yes you lose the potential to instagib a low health enemy, but the tradeoff of saying in all chat "Wait for it..." and then getting that delicious ghost from afar is well worth it.
I have my battlemage back. It's been a while, old friend.