You mean you want to be able to "communicate" during the match? ("Perfect card." makes no sense otherwise.) And XP as encouragement to use it, too. Lovely idea!
Just imagine, you're sitting there, thinking, and the opponent spams the "communication" buttons. Not distracting at all. Not at all. Haven't we got more than enough threads about how bloody frustrating the game is, for newcomers (omg the game is p2w) as well as for veterans (running into only cookie cutter decks)? Surely we need more of that. "My opponent was spamming me with some stupid chat lines and emotes during the entire match."
Nah, ingame communication, even if restricted to preset one-liners and emotes, would never get abused at all.
Never.
Here is a video of someone gleefully enjoying the game:
https://www.youtube.com/watch?v=AUiP...ature=youtu.be
That person has her webcam blended in in the last match. Look at her. Listen.
Now imagine you're the opponent.
Wouldn't you love it if that person could send you her comments via emotes and fancy one liners and ingame chat? Maybe even Voice Chat, so that you could hear that condescending laughter and the "want to be my frieeend" taunts?
Now think again if you really need ingame communication with your opponents.
Would that help you enjoy the game more? Really?
Lean back. Think again.