Since assistants have come out, there have been some really cool new assistant types (factotums, atronach, cats, birds, DOGGO!), I'd like to suggest a change to the current "each one costs 5k crowns" approach.
I would love to see a base skin assistant cost the 5k to unlock the assistant function. Each skin however, could cost only 1.5k. I think this would encourage players to purchase more skins for the assistants since it isn't the same cost for a duplicated function. I know for me I do try to budget so I'm not spending crowns on things I already have, but I'd be fully willing to pay 1.5k crowns to unlock a different assistant skin.
Assistant skins could also be added to crates as a legendary or higher reward then (and you only have a chance to get them if you have the base assistant unlocked).
Just a couple thoughts 😊