If you remember in the MOU (Memorandum of Understanding) between the OTS and WMI, they put it in there, that WMI owned the mortgages. They were called "top-tier" and specifically mentioned as capitalization. I don't have that doc anymore, but I bet you do!
I may be off base, but the lawsuits are referencing the 118 page doc and both FDIC and JPMC are saying they don't have any culpability in these cases, because the FDIC never transferred the rights/deeds. If you remember, FDIC seized the corporation of WMI also. (Illegally I may add) and gave it all to JPMC.
In your post...WMI stated several times that they were never issues of mortgages, nor were servicer of mortgages, or were owners of any mortgages. Very true, WMI is the holding company, they don't issue mortgages. WMB and WMBfsb were the banks who issued mortgages capitalized by the bonds of WMB. WMI was the parent. FDIC seized WMI, because the BOD's were intertwined and they used a "legal precedence" to seize the (Operations) corporation too.
It comes down to Bair not wanting to use FDIC Insurance funds for WAMU, so she stood in the way of WMI selling WAMU to anyone. She wanted to seize it, because if she did not, there was a chance her FDIC funds would be depleted and she would have to go with hand out to Treasury. She gave it away "for free" (2.2B goodwill) to Jamie.
SHE WOULD KILL A SOLVENT BANK AND ITS SHAREHOLDERS BEFORE SHE WENT "HATE IN HAND" TO TREASURY! SHE WOULD NEVER DO THIS! Ask HANK