If he'll be sober i'm sure the shows will be great, just like the ones from 2012, hell he can drink a little bit but being sloppy drunk or high really kills performance.
vs
You can clearly tell that he was actually sober and enjoying himself on stage, I just love the moment at 9:18 when he wants to close the song but the fans keep on singing Wooow and he looks so happy and surprised.
In 2014 he looked like a fat sloppy drunk mess who was clearly suffering from emotional pain and tried to act happy and cool...
I would really love to see Richie do his own thing without Orianthi and just perform and really enjoy himself instead of being drunk and acting like an old hippie rock star.