Well, this was 90 minutes of work. Bummer.
Trying to suss out anatomy and foreshortening is not as easy as I was hoping. It's difficult to explain but drawing comic art/anatomy isn't the same as drawing from reference - it's much more stylised and dynamic. When I draw something from reference it often lacks the kind of 'impact' I feel my last 3 deviations have. But after all, these are all about the practice so I'm hopefully learning every time I do something like this - which is what I want!
Will likely turn it into something finished at a later date!