"Additionally, you cannot redeem partner airline miles with your partner frequent flyer number and obtain AAdvantage program benefits such as priority boarding and access to preferred seats."

I take this to mean that you cannot redeem flight awards with, say CX, and then switch to AA for the AAdvantage perks. It does not say that you cannot redeem with CX and switch to, say, BA. Anyone have any experience with this?

Also, if changing the FFP is not possible, would it still be possible to enter a OW lounge just based on the physical OW status card?