I think the legs look a little off, too. Might be the fact that they're so thin compared to the body. Though, if you wanted to emphasize upper-body strength, you might be able to get away with tiny humanoid legs, instead of the more beastly-looking legs you have now. Aside from all that, something about the angle of the legs seems off to me, but I can't say for sure.
Also the feet don't look very threatening maybe?