I don't see that, tbh. Brown's offense (same as Brooks' which, imo, is by far the worst offensive coach on the league) was basically give the ball to your star and hope for the best many times without even getting into an offensive set. With Memphis you can see pretty clearly that on every trip to...
I didn't count Haslem 'cause like I said I was thinking about a hypotetical scenario where Miami plays small, if the Heat remain playing with two bigs then yes, Bonner could be very useful against Miami.
Bonner has no place in an hypothetical final matchup against Miami if Spo does the smart thing and plays small-ball with Lebron at the 4 and Bosh at the 5. There would be no place to hide him, tbh. Maybe on Battier but not much more.
It was kinda like what they did against LAL and it was just what I expected. On our side of the ball the matchup is pretty similar to that Lakers series, two imposing players down low and horrible shooters outside.