They do look small compared to what we are used to, but I assume some decent film-making tricks should take care of that.
On the note of the Predators I do still stand by the fact that I am relieved by seeing them. That said they arent perfect, nowhere close. They just seem to be closer to the orginal designs than I thought they would and look a lot better than the avp ones. Also Im glad they aren't the BSPs that were in the script.
As for the suits? They look kinda.. Unfinished. They seem to all look very pale and with little detail. That said, the quality may be causing that. Also, where is the mesh? They look awkwardly naked or something. I still stand by that they are better than I had hoped, but there is obvious room for improvement.
The masks look decent in concept but poor in execution.. But that could be picture quality again. I am still willing to bet this movie will be a vast improvement over the AVP movies.