I like this idea immensely, especially since gives some depth to Angharradh, as well as weaving Vandria into FR very nicely. May I steal it, please?
Headcanon of my own: Elves (of all varieties) can get buff or fat like other folks, and aren't universally willow-thin as a rule. They aren't really common, though, to the point where if you meet a beefy elf, odds are they've put effort into building that body shape.