Hi.
I'll make a suggestion. When I host a game, and someone tries to join in, it would be nice if we had a "Reject" option next to "Play" option. Also, it would be nice if that player gets a message "xxx has rejected your offer" or something like that.
That's because now we had to go back and create a new game when we don't want to play that person. And there are too many new or low ELO rated players who just don't understand when I (or someone else) do not want to play them.