Monster Hunter Fan Art . Need critique. (First Time posting)

[Stichmouth]

I worked on this as much as I can till I had no idea what more I can do. I fee it could use some more stuff, friend of mine said tighten up the arms and hands and your good. I want to know what you guys think.

I also...don't quite know how to go about the "detailing" process since it's been pointed out that my stuff tends to be in the "rough" and I want to know if I got the detailing part right in this piece.