I don't know the answers to your interminable questions. All I know is that placing one's faith in the excellence of SY is a gamble these days. So we're left relying on the Germans to charge CB and they seem no nearer to connecting him to Madeleine McCann's disappearance than they were when they started their investigations.
What is to be hoped for is that Brueckner will be subject to due process for the serious crimes of which he is currently indicted, irrespective of how many procedural spanners his legal team throws into the works.
Till that process has been concluded we internet sleuths will just have to bide our time until investigators decide what further steps are applicable.
In the intervening time it is worth pondering on the thought that the BKA have intimate knowledge of the evidence they hold regarding Brueckner to which neither he, his legal team, the media or internet posters have access.
Let's just wait and see what that is shall we. Inclusive of the fact that no-one has so far had cause to 'fall off their chair' another thing of which we we can be certain, is that it won't consist of his alleged alibi evidence. As far as the rest of it goes, I would not be as confident as you are when you speculate they are no further forward than
"they were when they started their investigations." that you are anywhere near the truth.