Most newer games have Squad Commands though, so playing without a mic can work if people can just stay together and work as a team and listen to the commands that way.
People who don't use mics in team based games are scum IMO anyway. Sure, I could understand if you are mute and all that, and if it had a dailouge wheel to help with orders and such. But in a team game? Yeah... that does not fly in my ballcourt. Get a mic and help or run off like a lone wolf and die, leaving us to our doom. No mics... they are all terrible.
Me not talking on a mic does not mean that I can't hear someone "giving orders" over his mic though.
Unless games suddenly started muting everyone just because one player doesn't have a mic.