You are twisting several things around here. Nowhere has the FAA stated getting an exemption is a rubberstamp paper process. You are making that assumption with no facts in evidence.
Here's what you copied and pasted yesterday in post 262:
As with the process for issuing LODAs to owners and flight instructors, the FAA will consider adopting a fast-track exemption process for owners of limited category and primary category aircraft seeking to conduct flight training for compensation in these aircraft. As with experimental category aircraft, the FAA will consider granting relief for flight training operations when compensation is provided solely for the flight training and not the use of the aircraft.
The FAA clearly states they are considering adopting a fast track exemption. They go further in explaining the fast track would be considered "when compensation is provided
solely for the flight training and
not the use of the aircraft".
So your premise "they (warbird operators) should file a new lawsuit" is also incorrect based on what you previously quoted from the FAA.
And here's the exemption process:
https://www.faa.gov/regulations_policies/rulemaking/media/Petition_For_Exemption_Guide.pdf just in case you are curious to how it works.
If the FAA does fast track an exemption process for Limited aircraft then that will be a good thing. And as far as clearing the air on what is actual flight training versus selling rides, the exemption will clearly spell that out.
Curriculum. Possible
Testing. What testing? While some warbird aircraft may require a test for an LOA or possibly a type rating, others do not.
Stage Checks. These are a part 141 requirement, not applicable to the discussion.
Solo. What is the requirement to solo the aircraft for a type checkout? People receive ratings such as Sea Plane and Multi Engine to name a couple without ever soloing the aircraft.