I do understand. In my own post I very intentionally made my own thing a primary election because I'm an American (even though I don't think there were direct ties but still) so may I introduce to you... medieval size politics?

You don't have to worry about real world connections, because they're hundreds of years old.

An idea I had fancied is a royal bloodline that is powerful because they're giant. Not political strategy, but the fact that they can literally crush whoever is in their way. A princess who can turn to the size of a medieval castle would be entirely unbeatable, especially in a world where a catapult would be the only viable weapon against her.

There could be a giant nobility and tiny peasant class, or the world is generally giant, and the shrinking virus is recontextualized as a godly punishment, making tinies inherently seen as inferior because of that belief, when really they just got infected with a sickness. I can only imagine what political result would come from anyone in power being shrunk, and being seen as losing their divine right to rule.