Abomination is pretty tiny.
I checked this out thoroughly and he's actually the right height and muscle mass IMO. I think people are hung up on the torso joint/tooling and the immediate abs proportions around it. I snapped this pic on my way out the door this AM:
Marvel wikia lists Thor at 6' 6", Reed at 6' 1", Thing at 6' 0", and Abomination at 6' 8". As you can see that would make Abomination the right size. Possibly even a little too tall believe it or not. Thing might be a little tall too. Anyone who reads a lot of Marvel titles knows that the size of characters differs based on which artist is drawing them at any given time. And you might even disagree with the official marvel wikia listings. Here's how Blonsky looked in his 2nd appearance:
If you put Abomination on the counter and stand back 5 feet and look at the figure, it eliminates the detail of the torso joint and you can see the proportions actually look pretty good.
I love the figure.