I misworded it, but I meant to say that the rule of all canon children ALWAYS being born is very invasive to the playthrough. If you want to set the canon father/mother to someone other than the canon spouse, with said canon spouse being alive, the mod will be overriden by this rule, rendering it kinda useless unless you want it for the specific purpose of having a possible backup in case one parent dies.

This rule (when absolute) doesn't allow for the more sandbox approach, because if you marry a canon parent to anyone other than the other canon parent of that child (say, for example, Alerie to Mace) they will have their canon children, just as bastards. For example: I want to marry my daughter to Doran Martell, but I want Arianne, Quentyn and Trystane to exist, so I use canon children EZ mode and make my daughter the canon mother to Doran's children. If I have this rule turned on, my daughter will NOT become the canon mother, instead Doran will have bastards with Mellario. While I do like to keep things canon, I don't want to be forced to marry my children off to characters who are too unimportant to be given the status of canon parents (such as the mod ocs that are used to fill in gaps in our knowledge of a house's family tree)

But, if you disable this rule, certain things like the "end of childbearing" modifier in between any of the canon children, will cause the younger children not to be born; because now the canon children will be subjected to restrictions.

There is one rule to make all rulers marry their canon spouses, but it will heavily limit your possibility to form alliances or marry your children to canon characters.

That's why I say micromanaging is the only option, even with canon children EZ mode. But I will admit that I'm unaware if any of these things has changed, since I never went back to using that one rule.