I'm tempted to agree with you on the importance of OD to the team. I suspect it has an influence on the number of turnovers you generate and, since all offensive systems will feature some jump shots from guards and SFs, it has value throughout the game in limiting the higher percentage jumpers.
With regards to OD on PFs, I would say it has value there too. It won't be reflected in the match ratings but I believe a PF with some OD will defend a jump-shooting PF better than a PF without OD would do.