It doesn't meet the old ones either
Whose old ones? I'm guessing that the USAF might argue slightly differently.
Or does he sign, and drive a bus through Haddon-Cave and, effectively, negate the need for the MAA.
That's quite a leap. Surely this is what risk management is all about? If he accepts that we can never achieve the safety case that you, DV and Chug want because the evidence simply does not exist (because the aircraft is one that has been operated for many years by a nation with different requirements and regulations) then he passes the waiver and he accepts the risk.