I've had more difficulty getting into Asgore's character, which bothers me as a writer. I've written a number of #Undertale stories but Asgore's been pushed off the page in all of them. I felt it safe to assume that he'd want to disappear from the public eye at the earliest opportunity, and in any case Asgore was never a leader, really. He was fine as titular head of a stagnant kingdom of monsters in the Underground, but with _real_ challenges ahead, Toriel would be the only credible monarch.
And I could _not_ see Toriel ever reconciling with Asgore, not after what he did. But what _did_ Asgore really do? Let's examine it.