Because when Ice Queens melt, they're amazing, like Miranda and Morrigan AND VIVIENNE
I'd probably want to romance her, based on what we know about her personality and how much I love political power couple stories, regardless if it's specifically an ice queen romance or not; but I'd dearly love if it were so because after getting the 'I may have found a sister' speech from Morrigan, I can't bring myself to make a character to romance her. Makes me tear up every time.
Plus, Vivienne's a little more self-confident than Morrigan, whereas Morrigan always strikes me as needing a supportive friend more than a torrid love affair, you know? One day, though.
TBH I'm more hoping Morrigan says something about a female warden friend than I am about Alistair updating us on his political threesome.