She was 'assessing his strength' as an Earthbender? ;) ...Seriously, though, I really want her to teach Korra and Bolin how to metalbend.

Yeah - and not just benders, but your father is the AVATAR. People would be expecting great things from you. Although, I did see one thing that might have jossed that - Amon's hands are quite light, and Bumi's official art is pretty dark.