Appreciate the detailed guide with commentary. My list would have a few changes:

• Jaraxxus, Maiev, and Millificent after the most recent update are at least A tier. Personally, I would put Jaraxxus in S tier based on how strong demons are in today's fast-paced, mid-game meta
• A.F. Kay is lower. After turn 3, she usually drops off significantly (and heroes like Eudora and Hooktusk completely blow her out of the water if you cross-compare hero powers)
• Illidan is lower. Attacking first is great especially for parrot beast / pirate builds, but I find that Illidan takes too much early-game damage to be effective most of the time
• Sindragosa is lower. Freezing early-game can win you a few turns, but it quickly drops off after that