in my opinion (that of an ardent 558 supporter with limited, but not uninformed, knowledge of the 'behind the scenes stuff') is very simple.
money aside, CAA aside, MA aside, publicity aside - there is one single obstacle in the way, preventing 558's ASSURED future as a display aircraft - TVOC!
as FFM so elloquently (as ever) pointed out, there are very many issues at the core of TVOC that need urgent rectification. Dr Pleming (arguably) has proved to the world that he is the leader of a team that broke all the rule books, proved many learned people wrong and actually flown the world's very first ex-military complex aircarft type.
as i have said at length elsewhere, getting to that point was the focus of a 15 year dream. now, however, 558 finds herself in a whole new environment - she is now actually an aeroplane (thanks to the incredible dedication of those like FFM). there is currently NO-ONE employed by TVOC that has any experience in operating an aeroplane, let alone a Vulcan, LET ALONE displaying a Vulcan!
consider this - you purchase a run down house and decide to renovate it. such a project requires all the appropriate gas checks etc. okay, so it is finished - does the fact that you were capable of turning a 'wreck' into a habitable abode AUTOMATICALLY qualify you in the world of selling it? no - that's the job of an estate agent! would that estate agent profess to have the skill to rebuild said property? no - each must appreciate and respect their own, and others, limitations.
as FFM says, not without an unreasonable amount of authority, TVOC's work is done. bring in the team that know what to do next as TVOC have clearly demonstrated that they really do NOT know what to do next. simply saying to the world that they have achieved what many thought impossible does NOT equate to them knowing what to do next.
sm