I don't really mind if you don't follow the design exactly, but I do have a few nitpicks about the colors. Firstly, I'd turn those technic pins on the upper legs sideways, so that the blue pins aren't visible from the front. Or replace them with black or white pins, if you have those, but they're rare so you might not.
Also, silver is a pretty reflective color, and seems odd for a Makuta who literally hides in the shadows.
Finally, and this is just me offering advice on the MOC itself: I'd go with either black or dark grey, but not both.
And I have to ask out of curiosity: is that Metru leg armour attached to anything, or is it just resting there?