Yeah the build in my team is not good enough yet either. I think my SF is fine for it (assuming he doesn't need that high SB) but my PF and C are still underdeveloped in SB (although they have at least some of it).
And you are correct in that 2-3 might work even better against LP since they attack even more down low and less with jumpshots. But I think in my old games against DHC I also defended succesfully against LI (he had the worst outside shooting so I only used it against him or unsuccesfully against CSP when I was desperate because he was better).
I'm already in a fun PL so I can't help with your federation but the idea sounds good (albeit a bit difficult due to gameshape) so I'd improve the samplesize a bit and compare only 2-3 and MTM at first. But I like the idea.
Crunchy! If you eat fast enough