I got the vibe it was their last show. The nice thing is, retirement doesnt work in music like it does in sports. The game doesnt pass you by. You can always pick up where you left off and literally not miss a beat.
That being said, my strong preference is they continue as a 5 piece. This is not my original idea but a couple of close friends have suggested that the show doubled as a tryout of sorts for Jon Green. I would love that. I think he clicked well. And as was also mentioned to me, it would free Mike up to move around the stage as a true frontman. I also think Mike has a great and unique voice, and lets not forget he wrote a lot of what Chester sung. He can sing terrible and an octave down on Chesters screaming parts and it will still be music that is in part his. Ill be fine with it. Even on OSC.