Problems with altimeters, degraded seals in the fuel system, preservation procedures not carried out, out of date ejector seat cartridges, ejector seats maintained in a 'home facility', engine over speeds with no remedial action, known defects not documented, maintenance documentation missing, no OEM back up. I agree none of these appear to have materially contributed to the accident, but good reasons not to display fly the plane.
Largely inevitable given the age of the plane and the resources available to maintain it. Martin Baker have voted: no longer safe.
The amount of time the pilots get to practice on type is also, I suspect an issue, and explains why most of the accidents with historic planes listed in the report are described as 'loss of control'.