@GoozeFn_PSN yeah, whatever way you want to do it. I'd prefer that there be an actual way to use most of the cards - like "hey cool, I can insert this card into my Twins theme team...and that theme team will make my overall team better" - some system like that.
But, that's more complicated and will annoy some people, I'm sure - the simple way is just to let you build a theme team as your main team, and have it be competitive. That's tricky to do, though - like, people aren't gonna go try to get the super rare Chase and collection cards if you can just do a theme team that's about as good. Any company that makes any game is gonna want there to be "super good shiny things" for you to covet - and those things have to be better. That's the reason we're stuck where we are.
But again, there are lots of systems that have been invented where there's a use for "lesser cards" - an actual way for you to use and build with cards that everyone knows are not the best ones.