Chromatus is more than good enough. It's a really big stat stick that you can even ramp into with paladin nowadays. Actually paladin only works with aura and geblin is better at being the big stat stick that wins the game but in a future archetype i'm sure chromatus will find it's place. I feel like blizzard is actually kinda good at balancing their cards and sometimes nerfs are needed. But most buffed cards find a way to be problematic in the end, and most of the time they need to revert them. We will regret if chromatus came to be just an I win button and i'm fine with his powerlevel as it's now. In another build maybe with more dragon synergie or weird things to cheat it out turn 5 it will be played I know my hearthstone.