the color for the cloak works just fine a nice neutral grey-green. I like it that you have painted him in cygnar army colors.
On the paintjob itself, it's decent, but as you said yourself, it could use more contrast in the form of shading and highlighting. Like the backside of the cloak, it looks a bit flat.
I'd try to work in some more colors in the rock too. Browns and greens mostly
He would look very good while leading an army I think.
I take it that you play Warmachine?
And last but not least: Welcome and have fun!! if you have the time, you could tell a bit more about yourself in the "hello my name is" forum
