I think I would have felt a lot better about it if she'd made the choice. The Pompeii episode sets it up, and this could have paid it off. All that lost, the character unchanged, the Doctor killing somebody yet again with the words "I'm so sorry"... and I wasn't sold on the necessity even in the least.
Oh well. RTD won't be doing violence to any more Who stories. I'm gonna watch some Buffy, I think. Or rec me some classic Who, maybe?