He has a point but he doesn't go far enough. Coaching, at least on the Suns, was definitely a problem. It's not just the players -- the coach needs to put his players in a position to succeed. Period. And frequently, Vogel didn't do that. Let's take the 4th quarter woes for an example -- we saw it time and time again, we would play well for 3 quarters and then continually implode in the 4th quarter. Why? Anyone with two eyes could see that it was because Book and KD would consistently change the way they play the game and become ISO players. Every time we had a bad 4th quarter is because we went away from what was successful earlier in the game.
Now, if we continued doing that same thing with no discernible change in the way 4th quarters were played, whose responsibility is it to remove that tendency to ISO? It's partially on the players, sure, but you've got a couple things here -- 1) the players don't trust their teammates in those minutes, and 2) the Coach is not stepping in and stopping it. The first one is fixable by having more time on the floor, the 2nd is hard to fix if the players don't respect anything coach would draw up. In that case, the coach is responsible -- he's responsible for not holding his players accountable and forcing the issue. If Vogel (and by extension JJ) are ok with our star players to just ignore the coaches in late game situations (with NO attempt to actually rectify it), then why have Vogel and JJ at all? And if Vogel isn't vocal enough to hold the guys accountable and force the issue, well that is the very definition of having the wrong coach for this group.
So Barkley is only half right -- the players share the blame, but there is no room to give Vogel a free pass here. To do so reeks of ignorance, which is hard to believe coming from such a veteran player. Say what you will about Barkley, but he made the most of his time in the league, and was a coach killer in his own right.