In my opinion Madeleine's parents' reputations are doing just fine outside of a very small contingent whose opinions don't excite too much attention outwith their rather cringe making self promoting stunts the latest being the epistle to Portugal.
In my opinion, none of it from one FOI request to the next has been undertaken with Madeleine McCann's best interests being either considered or taken to heart.
Perhaps you are right but that’s FOI requests on both sides, none of which are, as you say, ever done in Madeleine’s interests but simply to, hopefully, prove their very narrow points.
As to the McCanns reputation if everything was going as swimmingly as you suggest why the application to the ECHR ? It’s not about ‘damage to the search’ this time as there is now two full-blown investigations being carried out in two countries. So what reason is there other than to save the reputations you seem to believe are doing just fine ?