In any MTG Ravnica set you can expect the weirdest card types to come in blue-green, and Murders at Karlov Manor is no different
Treasure tokens can especially help you cast cards with improvise, waterbending, or affinity for artifacts like Battle at the Bridge, Spirit Water Revival, or with Tezzeret, Master of the Bridge
I recall from my days playing Pokmon that metal coins especially put high value cards at risk of damage if they end up on the receiving end of a falling coin
Given the Onslaught and Legions sets so far, you're looking at the most powerful creature in the block
Still, these bans hurt a lot of players regardless of their interest in Commander, and that's because of card value - which can be a massive problem for small businesses and sellers who suddenly had to account for thousands of dollars in losses due to the plunge these cards' prices have taken
Theres also the inherent benefit of deck-thinning, though from a statistical standpoint its not exactly clear that deck-thinning is all that fruitful in a game of Commander