This was a big eye opener for me at the Division 3 level. In fact, its one of the reasons why I acquired Bryan Dubois. Dubois is a young player with sensational IS, strong JS and mediocre JR (plus respectable passing). He rates well in both OD and ID. I also recently acquired a player who is short for a PF at 6-6, but has a very strong inside base, and a guard like base with respectable JS, JR, and PA; only downfall is that his OD is not good.
So the goal for right now is to train 4 players at the Guard positions. Two I'm grooming for SF and the others I have slated for guards. I bought my PGs with a minimum of Prominent Passing, and my 3 core long term posts are all at a minimum of respectable PA. That way I can shorten the Passing training from my the NT regimen and spend the last 3 weeks on IS/ID training for young posts (Dubois being hybrid trained).
I'm hoping this leads to two decent SFs that can grow with me over time, and that can facilitate the offense in any style of offense.
To me SF is the most important BB position because it impacts both the defensive and the offensive scheme possibilities.