Honestly, I think the character sheet is more like a contest item you just have to check off. Looking at last year's entrants and winners, it seems like as long as you have it in any form, you're good. You're right that doing this for the game or film industry, you'd likely be required to do a nice orthographic shot that someone could build a model from, but there have been a lot of entries that do more of a posed shot from front and back and it doesn't seem to bother anyone for entrants to do it that way.
Totally separate note: I know you're still refining it, but his left hand has a really defined wrist and the right one has a much lumpier, less shaped wrist. Just thought I'd point that out. Lovely work on that foreground character!