If it's possible to make a comment that isn't part of the pro/anti tit-for-tat...
The main thing that sticks out for me about these efits is that there is a lot of confusion around them. The Smith sighting, and how various investigation teams have treated it, is also something that isn't so simple.
We know these efits were made around five years ago by the private investigation team the McCanns hired. But they have only just been released to the public.
Mr Smith delayed in relating what he saw and his suspicions, and the Smith sighting was initially not taken as seriously by all parties as it perhaps should have. The only people to think it was important, up till now, were Amaral and the "[ censored word]".
Now it appears that the McCanns deliberately suppressed the release of the efits. At some point, perhaps a couple of years ago when both the PJ and SY started their own separate (although I'm sure collaborating) inquiries, the police forces in both Portugal and the UK got hold of the efits.
Again, however, we only learned about them the other week. Perhaps the police wanted to make sure this was a credible sighting, that this man actually could be a "person of interest" and not just some innocent random bloke. Putting out efits of anyone who was seen at the time in the area without having properly investigated them first would only make things worse, create confusion, undermine the credibility of the inquiries. They may have wanted to try and do all they could to track this individual down and eliminate him before releasing an efit, like they did with Tannerman. Once they had exhausted all possibilities and got a credible timeline together, then they released the efits.
So, maybe the police had a legitimate reason in holding the efits back until releasing them to the public. The McCanns, however? Not only did they not release these efits, they even, it is claimed, legally threatened the investigative team so it would keep them hidden. The McCanns would not, however, be able to prevent the police from getting hold of the reports and the efits once they started their enquiries.