If you actually look at the cards an Astro has, they have two of each card (12 total) when they pull out their weapon.

Previously it was possible to spread a card, draw the same card, and shuffle into that exact same card (which would imply 3 of a card), so that's already lore breaking.

Or the fact that when you spread, the number of cards revolving your weapon doesn't reduce.

Also cards have always had the same grab rate. People have confirmation bias whenever they're like "I drew only Spires" and disregard that time they only drew Arrow or Balance.