I very much like the the relationship between Alistair and Anora in all its extent - the evolution from the obviously mutual contempt in Origins, shade and barbs and slap in the hand and all, to the great dynamic of mutual respect they show in their one scene together in Inquisition - speaking in turns (instead of over each other) and completing each other's argument (instead of undermining each other's authority). Regardless of how one feels about them in terms of shipping, it's clear that in the ten years they've spent ruling together, they've learned to make it work, at the very least. I'm a big fan of them ruling together, and believe they do a much better job together than either of them would do separately. As their slide says back in Origins, they complement what each other lacks, Anora needing the influence of Alistair's big heart over her dry pragmatic approach, and Alistair needing the influence of Anora's logical brain over his often overly emotional approach.
Other than that, in shipping terms, I do also very much like them as a couple. I think it would take both of them a long time to overcome the emotional wall they build against each other, for their own valid reasons, but time is all they have - they're married for life, for good or ill. We do have the canon fact that they do eventually open up and learn to respect each other, so I think it's not unreasonable to headcanon that, over time, this learned respect and the comraderie they share could evolve into more romantic feelings. I've said this before in an older post here in the thread: I ship "Alistair/Anora as a couple that starts off as merely political, and even slightly disdainful of each other, but eventually develops a relationship of mutual respect, trust and friendship over time -and who knows, even that different, more low-key kind of love that comes from comfortable familiarity rather than flaming passion."
In my world state, in particular, where the Warden is dead, this is particularly easy to headcanon, because as I mentioned, Anora and Alistair already have something very intimate in common - they lost the first person they loved to that person's own reckless stubborness, and that's something they can at least empathize with to cut each other some initial slack.
And maybe they'll never feel exactly the same way about each other as they did for their first partners (say, Alistair for my Warden, or Anora for Cailan - and yes, Anora genuinely loved Cailan, we do have canon evidence of that), but you know. People move through relationships, marry a second, third time, find new ways to love again. I don't like the idea of these two characters I like so much forever wallowing in eternal misery, and prefer to think they could make each other happy, in their own way. Maybe not in that puppy-love crush way they had on their highschool sweethearts, but maybe in that "you're the mother/father of my children and I respect you a lot for that, and also for putting up with me when I'm being an idiot or smelling real bad" more adult way.