I would guess CIP/VIP pax would be treated on a case by case basis, though they are probably already in the highest cabin and afforded every service anyway.
Given there are many CL who do not fly all that much it is absolutely appropriate that P1 is higher, just as a CLPO be at the top. I have no issue with that at all.
And why would QF *not* preference their own members elite status above partners - every airline does this. If I'm flying BA or CX I would expect their own elites to get preference for op ups or whatnot. Seems reasonable to me and at the very least if I'm flying on a partner using my QF status I have no real leverage with the operating carrier in terms of points or whatever. all I have is their agreement as part of the partnership to honour the status.
Of course other fsctors will come into play - for example if there's 1 seat avail for an op up and you have a QF WP couple on the list, then a AA Plat (OWS) next in status order that single AA pax would likely get the op up seat simply because they wouldn't split the couple(I imagine).
And I suppose there will be other exceptions of the pecking order such as the case of P1 sponsored family members having (slightly) higher priority in their tier level for upgrade processing, or a partner airline VIP/CIP.