There is no exact word yet on how it will affect the general pull rates for each of the types of cards, including the already established types
Instead of spreading across too many themes, focus on one clear game plan and let your commander amplify it throughout the game
This then forms a big pot that any player can dip into, provided they only cast exiled cards they don't own
I'm not sure how good it is, but it's definitely need, and at the very least I'm gonna jam it in Depala, Pilot Exemplar
Depending on your deck, you might also want to look at Clever Concealment, Flawless Maneuver and Cosmic Intervention the latter of which is a lot of fun with fetchlands and mass land destruction, or board wipes when you run a lot of strong EtB effects