"On top of their game" is a very generous overstatement (at least as far as Mitchell, Braxton and Smith are concerned), IMO. I will try to catch them live, of course, but my expectations are not too high.
Your smug attitude is sad.
Please demonstrate the "degradation" of these musicians and explain your "expertise". Don't bother going to the gigs.
Please detail your reasons for dismissing their current work.