Offhand, I get two rather general impressions from the mammary-related fan-flack: (1) people are far too ready to define characters by body type, and vice versa, and (2) 'tis a strange line being drawn when you can say: "Morph this animated equine into a human(oid)? Sure. Give said equiniod anything above a B-cup? NOW it's weird!"
That said, athleticism hardly equals waifishness-quite the contrary in many disciplines. Consider this my vote of support for Amazon!RD.