The moc is very simple. There isn't anything wrong with that, but because of this it's also very gappy.
Things to add/remove:
Add more dark green to balance out the colour scheme.
Shorten the legs and arms, he is way too lanky
Remove those knives in his feet, they just look strange
Change the feet completely, give him mata or metru feet
Give him a weapon, every good toa needs a weapon.