My biggest gripe with the Alistair as King in DAI is less the lack of a romance mention and more the fact that... we KNOW he is undergoing the calling. When we see him in Redcliffe, he is undergoing to the Calling...at that moment! But it is never mentioned at all if he is King. No mention about how the king has been acting strangely (in my first PT, the HOF was dead). Nothing!
Alistair as a warden undergoing the calling and talking about how it felt gave me chills (thank you Mr, Valentine!!). The way his voice is soft, like he can hear it in the back of his mind, like he is almost talking through a dream. It really underscored, WAY more than my first playthrough with Stroud as the warden, that the Calling is a terrible, terrible thing...above and beyond what it means in terms of what the wardens are up to. I wish there was a way to have it hinted at, at least, when we meet Alistair as king.
Seriously, biggest emotional impact of the game for me was Alistair as warden. Course, I am just a weeeeee bit obsessed with him...