The Pacers would be better suited to keep their 5 and have Granger be the 6th man off the bench. You can't center a "2nd team" around Lance Stephenson and expect good results. You definitely can with Granger.
Bulls are going to be a huge threat as long as Rose is healthy. People forget how good he was. Upgrading Nate Robinson to Derrick Rose is as big of a leap as you can take. Will be interesting to see if they keep Boozer and what they do about their revolving door at shooting guard.
It's hard to say who the favorites are in the West with so many free agents (Howard, Paul, Smith, Igoudala, Jennings, etc). I'd have to wait until at least Howard and Paul are situated next year before I declare a favorite. Put Dwight on the Rockets and I think they definitely challenge the Thunder for best team. And if there's one thing I learn every year, never ever count out the Spurs.
I doubt Bosh is going anywhere. Don't see the Heat trading any part of the big 3. I doubt LeBron or DWade would be kosher with that. They just won the championship. Why make major changes unless they are getting a clear upgrade? As bad as Bosh was he is miles ahead of their replacement options.
As far as up and comers, everyone says the Wizards will make the playoffs this year as long as their healthy. That's the problem though, they have to stay healthy; especially Nene. They aren't going anywhere if Kevin Seraphin is the starting 4. I like the Pelicans a lot, although I'm not sure what their ceiling is if Eric Gordon is their best player. Maybe an 8 seed.
And I know the Magic were horrible this year, but keep an eye on them. They have some really solid players, a high draft pick, and tons of cap space. Lots of rumors that they might swap Afflalo for Eric Bledsoe. They need some solid veterans, but a core of Vucevic, Harkless, and Harris is a good start