Well, we have 3 short guards, plus Lee. So even if we start Lee, so no matter how you work the rotation, the only time we'll have height is when Lee's in. That doesn't change whether he starts or comes off the bench.
I think the bigger concern is how to get 4 guys who all averaged over 30 mpg last year minutes (Bradley was actually at 21 mpg for the season, but averaged over 30 the last month when he took over the starting spot). There's only 96 minutes at the two spots, and Rondo is at least taking 36 of them.
As I said in another thread, I think one of the ways is for Doc to slide Lee to the 3 at times, which will in turn necessitate Doc to slide Green to the 4 for even more time.