Yes, probably by next week they should announce. Harry Bring ( and others) has said that everyone is signed to do a season 14, so that doesn't seem to be an impediment. I agree with you that TPTB wouldn't just renew for sentimental reasons, they would go to the bottom line. CM has been a solid performer, and the change to the 10 o'clock time slot didn't kill it, so I think it has a good chance.
They did make us wait till the upfronts one year, several years back, but there were several actors who were not solid re-signs, if I recall correctly. So, yeah, it's a little tense if you want to