Imo, Kemba is a luxury, not a necessity. We already got a perfect replacement for him in Smart.
Smart has thrived in a starting role during the playoffs. He can do a million things on the court. Unfortunately, he ain't a scorer (although he has improved considerably as a shooter). It seems to me that he needs talented scorers around him in order to maximize his potential. To put it another way, he should be a regular starter.
If Smart is better suited as a starter, then Kemba is expendable. Personally speaking, I'd be open to trading Kemba. That being said, I don't expect us to trade him.
I have to disagree with you about Smart. Don't get me wrong, I love his hustle and am fine with him starting. As long as he understands he's there for defense and should shot when he has a GOOD shot.
While he started hot in game one, he also killed them in the middle of the first. The Celtics were playing great, moving the ball, playing with great intensity, then 4 times in a row Smart took it upon himself the try to force plays. Bad 3's and turnovers that changes the whole course of the game.
Too many times he just attacks the lane with no rhyme or reason and ends up taking an awful shot. Then after he hit a 3, the next play down was a 3 on none. 2 Celtics were wide open under the basket, and he takes another 3. Misses badly and Heat get ball back.
Again, I love a lot of what he brings to the team, but I would never want him to be running it. Unfortunately, for a guy named Smart, he doesn't play why too often.