One of the great things about Gwent, is the (near) total absence of being able to insult other players.
However, there are still a ton of wan....players that abuse especially "Thanks" (f. ex. whenever you make the slightest mistake). Now that you've introduced this, it would be awesometastic with a PERMANENT mute-button, as I often forget to mute players.
I would also personally like the little red X to be visible to the opposing player; let him know you are here to play Gwent and nothing else.