MWT is rather scathing about the missing evidence and the manner of it ... do read up on it.
MWT has quite a lot to say, but most of it is assumptions. He criticises the PJ investigation and assumptions, but his are no better.
He says in his review that he examined the files, but not that well, I suggest. He says no-one saw Madeleine after she was collected from high tea, ignoring David Payne's statement.
He tries to construct a definitive timeline but can't because of inconsistencies in witness statements, mostly Gerlad McCann's. He puts this down to confusion and also to discussion with each other, although he admits other interpretations are possible.
His woke and wandered theory is based on
a) an abductor wouldn't leave Madeleine's toys neatly arranged on her pillow
b) an abductor would have been more likely to take a twin who would resist less.
He reiterates that he doesn't think the McCanns harmed their daughter or had anything to do with her disappearance, but he gives no reason for his conclusion.
Once again he offers no opinion at all on the opened window and shutters.
http://williams-thomas.co.uk/sites/default/files/Review%20of%20Madeleiene%20McCann%20Investigation.pdf