IMO height comes into play significantly.
6'2 guys at the sf or sg spots which I have seen forever won't cut it.
I prefer bigger lineups, I have a 6'6 sg, and he gets his share of SBs with his average ability .
I have team wise got over 10 blocks a game quite a few times.
I had a tandem C(6'10) and PF(6'9), who contested shots and showed in the SBing colum, they had strong and proficient ability respectively.
If you wish to see SBing come to life, aquire two good SBers, and play the 3-2 defense........you will then se the impact on your defense