Long time since I wrote something on this board but I think Jon must have gone through decompression from the tour. I am sure Jon kept the show going through the tour but it must have been a heavy tour for him considering what happened. Album that did not work, Richie leaving the tour, having to keep up having the 'biggest' or 'highest grossing' tour ...
I think Jon is now in his 'off - time' where he totally stopped being JBJ the rockstar. It must be tiring being JBJ 24/7
I am sure when Bon Jovi gets back to recording, touring and so on we will see a total different Jon ...
Anyway ... Jon is still in great physical shape at 52 but we are just used of the guy who never seemed to get old(er) ...
Could also be that having grey hair is Jon's final attempt to get taken serious by whomever he needs to take him serious
The only thing I care about is - will he still put effort in making a kick ass record. Will he do his best to get his voice in shape as good as he can?