Some ideas that would be great quality of life changes, especially on mobile -

There's a lot of decks I can't play because if I draw too many cards, it's nearly impossible to discard down to hand size on mobile. I've tried everything and it just isn't possible to select a card when there's 10 or 15 cards in my hand. I often end up just conceding these matches instead of forcing my opponent to wait for 5 minutes while I desperately try to discard to hand size.

Another menu would be great- maybe a way to zoom in on my hand and select cards to discard?

Favoriting sleeves would also be great. I've been playing since beta and I must have dozens of sleeves by now, and I have to comb through each and every one. Being able to select a default sleeve is great, but I'd really like to customize more of my decks to match thematically.

The discard fix is a big one though. Again, there are certain decks I just don't play on mobile, and that's a bummer