As Milan I had Austria as an ally, when as part of the Ambrosian Republic disaster they received a Personal Union CB. As a result they turned from Ally to Domineering, and soon broke the alliance. I don't necessarily dislike this mechanic, it can be an interesting way to open up opportunities in alliance webs, but I wish there was a way to get them to drop the domineering attitude, even if it's difficult. As is it currently means Milan cannot rely on the emperor at all, because they're destined to get that CB and won't be able to ally them for 25 years. Is there a way to flip them back to ally, or am I out of luck?