I'm seeing something rather interesting here. Yes, the animal is rather shrink-wrapped, but it looks less that than emaciated. With the way the wrinkles and folds in the skin are, especially with how bulky it is even now, what you end up with after giving this guy a lot of extra tissue is rather 'fat', as some skin impressions seem to indicate hadrosaurs were. So this could actually be a remarkably accurate depiction, just of a starving individual.
TL;DR: Even though it's kinda shrink-wrapped, this is amazing! Great job!
It would be interesting to do the coloring and surrounding painting as a Lambeosaur that's fallen on hard times. Faded scales, etc. How often to intentionally starving dinosaurs get presented?
Actually, starving dinosaurs are being presented more and more recently, in a couple ways. With the advent of All Yesterdays, there have been some starving dinos out there. And with environmental protection coming more into the public eye, you will see more starving birds, which could help greatly with the coloration if you chose to do it. However, the most common in my experience is used to mock BANDits or the outdated reconstructions of the media. These will often be emaciated, to mimic shrinkwrapping, and often missing a great deal of feathers in those species that have them, to mimic their nakedness.
This would definitely be one of the few though, not of the many, and a starving dinosaur (Especially an ornithischian!) from an artist so talented and prominent as you would be remarkable, to say the least!