This is an excellent idea. The duo-game-chat should be the default setting when people play the game for the very first time, so that they won't be turned away from the game if they have trouble getting past the newbie stage (when the fun is minimal when you can't even beat AI3), as well as expanding our -I don't want to say this, but- decreasing community. It should be coupled with an option to toggle it, of course.
I honestly think the biggest problem of Elements is how hard and frustrating it is to get past the newbie stage; most people don't even know how to grind for a false god grinder because this process includes grinding 54000
(A fully upgraded CCYB's price), which is extremely strenuous for them when they don't know a proper deck to even grind AI3. Chat will help with that a lot; there are always people there who are willing3 to help.