Do PFs need OD???
i think this is a really good question. In the past i would have said no, because i had PF without good values in OD, and there matchup don't run frenzy with lot of high percentage outside shot(and the most player i know who they play could shoot).
But the last to season i had PF with really good defence(9 and 11), and my team was/is quite succesful even when i think that other teams have the much better players especially guards.
So i would go for minimum 5 better 7, and this is a skill you mostly get free. For real PF it cost sometimes, but you also could avoid this extra sum in buying C with OD and rotating them in defence ;)