This is fantastic! I just used it, and it really is great. Adding emblems in the future will be nice, too. Does this catch the non-token "tokens" like Monarch, City's
Blessing Day/Night card, Dungeons, or Morph?
One that I noticed is that "copy spell" effects that can copy a permanent spell don't result in a copy token. It came up with
Nalfeshnee. Does the feature pull tokens based on associated cards in Scryfall?
Nalfeshnee doesn't have a copy token as an associated card, but its oracle text does specify to create a copy token if it copies a permanent spell. Not sure how you'll get around that or if you want to.