My Arishem deck is winning around 70% of the time. It really shines in gaining cubes though. I was struggling in the mid 80's prior to Arishem. After getting Arishem it took me around 4 hours to climb to infinite over a couple days. My deck is built around board wiping instead of cost reduction.
2 cost Quake 3 cost Mystique and Gambit 4 cost Wong and Phoenix Force 5 cost Taskmaster and Darkhawk 6 cost Blob, Odin, She Hulk, and Skaar 7 cost Arishem
Hydra Bob is clearly redesigned specifically for the Deadpools Diner event because players can snap multiple times so it will be used to bounce him around when you want him in a different place by increasing the stakes again with another snap. In all other scenarios this is a completely useless card.
Boot man missing some key points why Arishem is very good atm, let's use energy as a value. You are 1 energy ahead of your opponent, you can only do that with Electro or Crovious which cost 3 energy and or 2 discarded cards. Any card that auto generates a card like the shield cards we can say that's an energy per card. So the deck itself is already giving you high energy value at the cost of being a bigger deck. Plus the cube gain like Brad said is very good cause your opponent only knows you can draw any given card 33% of the time.
To me, he seemed to miss it when he was being negative on it this past week, i felt he missed the point why people liked it. We got a new card that wasnt something that would be slotted in to one of the same decks we always play day in and day out. It gave us a new deck style. And its the closest we have to a draft mode which is what alot of people want. New equals fun, fun equals happy players.