I thought my sense of proportions, which is horrible, was off at first. But seeing the comments, I guess I'm not alone in noticing these Predators look a little short.
Overall, the Predators look okay. No drastic changes and a few positives, but I have my issues. I like that they look more like the first movie's Predator, and two of the masks look interesting- one's got a nice bone jaw motif, and the other's got an eye-catching swooped design. But I don't like the third Predator too much, the bulky one with grated mask. Reminds me too much of AVP. Also, I'm sure this was all snapped in between shoots, but they don't look as organic when the costumes are dry. We've yet to see the Black Predator, but for now, they look good. Not great, but good.
The rest of the cast is dressed well, though "Royce" looks a little awkward in his combat vest. The only odd man out is Topher; maybe it's just what he wears casually, but for his character, that looks more Eddie Brock than Edwin. The Predator structures and camp look neat, too, and the locations are all great matches for the story.