I think there's a lot that could be done to make sieging bigbois more realistic while having little to no impact on regular people. Likewise, I'm pretty sure hermit villages could be made sturdier without making major bigbois harder to siege.
An example would be how major villages tend to be a 3x3 to 9x9 mess of honeycomb when catapults can only move 4tiles/hour, meaning to actually crack large villages you have to spend literal weeks of 24/7 pushing a catapult. Shitters villages typically just have 1 big box. Attacking claims instead of walls akin to world 10 shield system is a HUUUUUGGGGGEEEEE nerf to the people that "should" be sieged, while leaving room for it to even be a buff for regular players.
Siege chess is also pretty bad for slightly buffing hermits, but making bigbois completely invulnerable. In theory it should be regular player's biggest asset, in practice it's too complicated and just confuses/demoralizes them. I've sieged a good handful of mid tier villages over the years and I can't think of a single instance where it seemed like the defenders had any idea what they're doing. Meanwhile I would not even attempt to siege a village if somebody who lives there knows how siege works, it's just a waste of everybody's time.
It's still a waste of time to rework siege for the 20th time. They won't get it right, and even if they did the feedback would be negative so they'd change it.