I see the Amell mage as a rather serious individual (when not running after Cullen) and most of all, all about duty. I don't think she'd get along well with sarcastic!Hawke (who is all about the flirting and the derp). Too bad every other Amell seem to go and get themselves killed.
To be fair it'd be even worse if Carver was there:
"My sister (whose shadow I've lived in my entire life) and my cousin (who saved the world virtually single-handedly), together at last... great."
You know, that is so going to happen in DA 3!
Awww... Everyone is dead. It's sad because it's true. TT_TT