warm solstice
A card's number can be difficult to discern at times. Those with vision impairments or dyslexia can sympathise.
At times, I have trouble discerning what number a card is, especially when it is affected by an edition and/ or an enhancement. Sometimes even just a debuffed card is hard to read.
A way to solve this could be to increase the size of the card's number. Perhaps this could be via a "larger number size" button, a slider, or dynamic based on cards held in hand.
Large hand size makes this issue even worse. Numbers are harder to see and cards are harder to select. This issue is especially prevalent on mobile.
Both those issues together are hard to solve. I'd also like to suggest a new method of selecting and viewing cards for mobile users. It would be similar to how you would view all of your cards on PC. You could scroll through all of your cards rather than having to perform a long press on each of them. You could confirm your selection with a gesture or a "Confirm card?" prompt.