If you feel like the past dealings among USTsy and FHFA and the US Congress are maybe stretching the "law of the land" even directly against the Constitution of the USA, then you will probably find a lot of other people have similar feelings.
The problem here is that there is only one case currently out there that challenges any events from 2008. That is Washington Federal, and they only seek money damages for pre-conservatorship shareholders. That is, even a victory for them would leave the entirety of the SPSPAs (including the NWS!) intact.
None of the other cases reach back any further than 2012 and the NWS. If there was so much illegal activity going on in 2008, especially now that we have seen many of the documents in Sweeney's court, why has nobody at all brought a lawsuit over the original SPSPAs, seeking to overturn parts of it or the entire thing? My only conclusion is that those with the big money and those with the legal know-how don't think that any such challenge can succeed. Given the insanely high awards bandied about for such a case (I have heard one person say trillions), somebody would have tried it by now if there was any chance of success.
so much of what has already happened in this is in dispute as to whether it is "within the law"
Only the NWS has been challenged in such a way as to have it overturned. The original SPSPAs are here to stay, including the warrants.