Polymorph system where I can have my characters primary token but link a secondary token that can be switched with a click of a button so I don’t have to remove one and drop another? Several benefits such as Druid’s Wild Shape.

Maybe a creature token “Inventory” they can store stuff in with a quick set button for either last used or favorite.

It would help track the creatures they have seen that they are allowed to turn into, especially over a long campaign.