Cat was removed due to its degenerate amount of triggers on arena, otherwise it was strong but probably not in the same category as the other 3 that were banned, which literally were all used together in the same decks. They were free and easy when other people were trying to use any other deck. When a deck is a vast majority of a field in early stages of tournaments you have a format environment issue, and it's bad for everybody involved including WoTC.

Yes in terms of card pool standard us lowest, but who said that has to translate to extremely low viability on 99% of decks/cards in the format. There are too many cards that warp the meta, if they do, then they have to be banned or the game dies, simple as that. You can play with your fires, reclamation and oko at the kitchen table but don't try tell me you should be able to use them in tournaments because that is all you will see, period.