I want to say sorry when I get disconnected during a match and have to restart the game and make them wait. Also, UW players should be required to spam "Sorry" every time they draw-go.

Thank you I want to use in reply to "Nice!". Or maybe when Bolas pulls a Ghalta from their deck. It is nice to show appreciation when you are given gifts.

After I slam Teferi, I say "NICE!" to really drive the fingernails in.

I feel like they should really remove the card-tracking feature. Like, each time someone draws a card, it goes to the right hand side and the opponent can see it. I don't want to shuffle my hand all the time.

Also annoying is how the game's "pass priority" system works. E.g. if my opponent plays Island Island and the game passes priority for him, but then on my turn I play a Grizzly Bear and the game pauses, I know with 99% certainty that my opponent is holding Blink of an Eye because it's the only one which will force my opponent to manually pass. It's true full control gets past this issue, but it's still annoying.

Same with cycling stuff. If game pauses t1 with plains, you know he holds cast out.