I'm not going to pretend this is a small task either; certainly none of us here can claim to have accomplished it. it's the realm of masters. still, it's what we all have to try for.
All the internal forms look very blobby still, almost pillowshaded. This shows through in the face where the dithering is very effective, but the forms are still somewhat flat and confusing. I'd work on defining the musculature and skeleton of the beast just a bit more before you dive too far into finish and polish...for example, how does it close its mouth?