At the very least, it would have been nice to get to see Talia really rip into Colin for all of his abuse. She's a (supposedly) smart, talented young doctor, but yet she fell victim to being manipulated by Colin's charms, and promises of love.
I get it, he was very manipulative of her feelings, although I do have a hard time believing that someone who has been through the rigors of medical school (she seems barely 21, you kind of have sustain disbelief for that in and of itself), let herself become so easily influenced by the likes of that slime.
I know this is easier to say as an older, somewhat wiser, woman, who's gone through her share of hard knocks in life, but I don't care how great the guy seems, and what he promises. I would not have given up my whole medical career for something so simple as revenge, and not even her own, but with regards to someone she had never even met, and didn't even know.
I would have liked to have seen her face him down before he left, and have her tell him that he no longer has any power over her, before very ungraciously slugging him in the jaw, and telling him to get his lying, sleazy self out of there. I don't think anyone would have blamed her, or even pressed any charges.