1) The 10% isn't a payback at all. The 10% payments were dividends paid to equity holders, not principal and interest payments to debtholders. 2) Treasury owns the warrants, not FHFA. HERA applies to FHFA, as conservator when it comes to the anti-injunction clause.
What are you referring to?
The Lamberth case only has to do with damages being paid to shareholders. A win there won't change anything about the seniors, warrants, conservatorships, etc.