So I am not sure if this is possible to code in, but it would be very nice from a QOL perspective if every time we got a premium card our decks would replace the standard card with it. Also when deck building instead of seeing a standard and premium and having to select the correct one, you could just add the card and if you own a premium it would be auto selected.
QoL for you, but not for everyone. What if someone has a weaker system, or simply prefers to use non-premium cards in their decks?
They can reduce or turn off the animation settings, and never notice the difference.