The P&A does not control the Bankruptcy case. Neither does the FDIC's authority under FIRREA. So to the extent you may feel entirely familiar with post-acquisition settlement procedures, the value of litigation claims can significantly affect the FDIC's adjustment of the WaMu sale - hardly non-sequitur.
And your belief that everything relevant to the sale of WaMu is spelled out in the P&A, well then, find us Schedule 3.1a.
GLTA
Disclaimer: I am not here to convince anyone. I am post, and a long, with a vested interest in this case toward a beneficial outcome. If I thought WAMUQ would be cancelled, or dwell on the possibilities of a negative outcome for shareholders, I would have sold long ago and went on a cruise or fishing expedition.