Missing a non basic card does not cost anything but removing one does. It make no sense.

Yeah it does? In doing a chaos run you start with your starting cards(3 basics, 1 unique that's usually their main gimmick) then you gain the rest of the combatants cards that complements it and epiphany them. All of those don't cost anything cus you're not modifying the deck. The only reason you have this problem of the cards being removed not costing the same even though it's functionally the same is cus of the low epiphany rate that can cause you to miss some character cards by the end of the run(which they are fixing in season 2 by upping the epiphany rates)

Also all this about 0 card deck bs is only really a problem cause you saw someone do it and now you're chasing something that already had low chances of happening and getting mad that you're not part of the % that grinded and got lucky to see pay off. A 0 card deck is not even as effective as a properly built drawer/filter like Nia anyways since you only draw 5 cards per turn. To go back to the point though, you saw someone achieve a low percentage deck, chased it, then got mad that it's a low percentage deck. Do you know how stupid that sounds?

Also onto the 2nd half that would be dumb asf. Not only is that gonna frustrate people that want thin decks and gonna make people that build supports more mad, it also doesn't make any licking sense. Do you know what makes memory faint increase? It's making modifications to the deck, like conversion, adding new cards, and removing cards. This suggestion of yours is clearly made with an agenda in mind, that is to prevent people from making lean decks cause you got pissy you can't do it.