It would be helpful if you could highlite friends screen name and see where they are in a game 8th of 9 just so your not sending invites in the middle of a round. or open a 2nd chat window where you could agree to meet up in a set time.
The last update took care of part of your idea, Kevin. You can now give a reason for declining a match when you're in another already. It's only a 1-way message to the inviter but it works. Invite away-you'll, you'll see. GL
YJ