I completely agree with you.
Though, her "association with a person's worth and bending" is really what drew me away from her character (that's just my personal opinion). I LOVE the Kiyoshi warriors and anyone that could hold their own without bending (Sokka!) from the original series, to see the main character of this one be so.. I don't know, dependent on the concept of bending (?) kinda disappointed me. People may argue that it'd because she IS the Avatar, but like you said, that's hardly balanced point of view. /shrug
I hope she gets more development in Season 2 as well, hopefully not through a love story.
And beautiful artwork by the way! c: