The man in the efit wasn't being accused of anything other than carrying his daughter at about the time Madeleine was discovered missing. If anything the efits could have served to eliminate the individual and thus refocus the McCann's private investigation.
I think tracking the man seen by the Smiths should have been treated as a matter of urgency and I do not think that it should have been left to private detectives some months after the event to do so.
The Policia Judiciaria knew about this sighting a fortnight after the event ... the files indicate that they appear to have done little about it.
They are the lead investigative authority in Madeleine's case ... the victims of a crime can hardly be criticised without bearing in mind the lack of importance attached to the Smith sighting by the PJ.
When has it been considered appropriate for the victims of crime to be forced to conduct major investigations? when that is the province of the forces of law and order.