I cant tell you how many decks I see online and in real life that benefit from a TWest but dont run it
He can lock out one of their big characters from questing, sometimes for two whole turns, buying us that extra time to find our Tremaines or Whole New Worlds to finish off what is left of their deck
With the addition of two new Esper Zombie Commanders in Aetherdrift, his color identity shouldnt create much of an issue
Tucking something on ETB is incredibly strong, especially in the blink colors of blue and white, and doing it to each opponent is going to be at least passably good in EDH
However, in-game purchases are already available for MTG Arena worldwide, so this can't really be the issue
Cathars' CrusadeCathars' Crusade is a white Commander staple that distributes +1/+1 counters with ease