I'm glad they are going back to the run n gun style. That is Suns basketball.
Frankly, after all this time, I want the team to win a title, but not by turning them into the damn Spurs. Run n gun can win a title - assuming a dominant paint player or two, fast, multi-talented wings, some decent to good defenders and a PG with vision - see the Showtime Lakers. Heck, see the 93 to 95 KJ/Barkley teams. Baring MJ and injuries, that team wins a few rings.
Even if you don't think the Suns can win with run n gun, they are, like it or not, built for a running offense right now. Nothing but an entire roster make-over will change that. And building an entirely new roster properly will take Kerr a couple of years minimum.
So, what to do? Go back to run n gun, and see if the new parts help fill past gaps. Yes, our defense lost playoff games for us many times in the last few years. But so did our lack of a back-to-the-basket paint player and a dynamic wing player who can create 1:1 in crunchtime. Both of those types of players can draw fouls late in games and maintain tight leads to win, especially against teams that guard the pick n roll well (ie, the Spurs).
We had Barkley fill the low-post paint role back in the day - Amare is not able to do it yet. Joe Johnson was the perfect option wing for late game situations because he could drive, score and draw the foul.
Today we have Shaq and JRich. Not sure they can do it, but those are the roles for them to play in the playoffs (if we get there).
This is why coaching for this team is so important. They have tons of offensive weapons, and are mediocre at best on defense. The right coach for this team would be able to mix and match those offensive weapons, and play as much defense as they are capable of playing.
Basically, Mike D, but willing to focus more on defense. We'll see how Gentry rolls with it.