I might be totaly off here, but I always thought of it as two parts of the matchup. One part is individual and one teamrelated.
So I think the individual defensive part is always OD for jump shots and ID for inside shots or a mix between them, but then you have something like the teamratings where SB etc goes into the calculation. If your other defenders are much better defenders then the one they guard they will be able to sag off more to help defend, just for an example.
I agree there should be a calculation about the shot being blocked or not, before the shot calculation. A altered shot should influence the shot calculation in the same way as a good pass.
Maybe "2- close-to-midrange jumpshot" is partually defended by ID and thats the reason for not so good OD power forwards are not killed by JS PF, or maybe thats just the "team"-part defending.
/Mannen