equip custom skins in teamfight tactics for the skins you own already for those champs

I made a similar post not that long ago. Probably the best response I got for why it might not be good to not do this was that the different skin might make the champion difficult to identify at a glance.

I don't think this is a good enough reason to NOT go through with it, but I agree that it means Riot should take this into consideration.

They have currently set ot so you can't use skins on purpose. It gives them a method to introduce different origins/classes for the same champion.

E.g. Cutpurse TF is currently set as a Pirate/Sorcerer using Pick a Card . If they used Musketeer TF instead, then you probably would get a Noble/Ranger using his E and will be manaless.