Really? I had no idea. I don't dislike it at all. Micromanagement, yes, but to be honest, there's not much to do at any given time of a Victoria II game.... so I don't mind. It's not the best idea, granted, but I like to imagine the diplomatic embassies, bans, prohibitions and the like. Anyway, I'd like to see a way to actively influence other countries' policies and diplomacy. Vassals should be the result of a game of influence, not this kind of zombie country that has no soul and no spirit. PUs, inheritances and royal marriages should also be a result of influence, prestige, diplomatic action and intrigue. Just see how the Burgundian inheritance worked: the heiress was courted by everyone. Everyone. Eventually, Maximillian of Habsburg won, because he was one of the richest and because he had manoeuvred the best. Others tried, very powerful ones, but failed. I'd like to see that kind of intent whenever a kingdom is left "without an heir". I'd like to see the kingdom itself reject the bride or the groom (like Philip of Spain was rejected in England, Philip of Burgundy was kind of rejected in Spain or Ferdinand the Catholic was rejected in Castille). I'd like to see events and mechanics molded on historical examples that can serve to make interesting games and plausible outcomes.
Does Burgundy need to disappear in every game? No. But to know if it has to be likely, examine the reason why it disappeared: failed state creation, lack of common identity and zero tradition, for starters. Then, no heir, that was bad, but regardless, Burgundy probably wouldn't have continued to exist much more, even with Charles the Bold being victorious.
But now, Castille and Aragon. Likely? Not necessarily. Spain could have formed y Castille and Portugal just as well, since it was decided in a civil war in Castille between Portugal and Aragon, each backing one candidate. The game doesn't even bother to model it right, or include Portugal at all.
Poland-Lithuania. Likely? Not really! Jadwiga could have been courted by Hungary, Austria, Brandenburg, even Muscowy... Lithuania won against all odds (a pagan nation after all). The game doesn't consider that either.
And I don't say "make an event for all these little things". All I say is "model your mechanics after historical examples and you won't need to!".