Since we are now entering the realms of fresh evidence, it is hardly likely to of the type that implicates the McCanns. Hence there is no need to drag in corruption or whistleblowers.
If someone makes a death bed confession that clearly links to the McCanns and appears to be sound, I can see no reason why this would not be investigated, remit or not. The remit does prevent OG from investigating the McCanns in routine manner, consequently any information to get this changed would need to be substantial. Fair enough. There is still no need for corruption or whistleblowers.
I've been through all the points and I can't find anything that would indicate a "sham" or "charade".
And I'm still not clear what type of "full report" Blonk expects to be made publicly available.
There may well be some form of blurb published for public consumption, but it clearly won't be the totality of whatever the internal one will contain, for numerous reasons.
If there are sound reasons to question decisions and financial outlay, that would be a matter for an independent police inquiry. In the Jersey case, it was Wiltshire police who took on Operation Haven.
I don't see any comparison between the evident Jersey fiasco and the review / investigation into the Madeleine case.