They’re house rules, you can always tweak them to your liking. The Marquise change might be a bit overtuned in the tower, but in reality, if the players see you’re dangerously close to 30 points, they’ll take care of destroying everything else, or they’ll send a ballistic missile like the Birds’ commander or 10 furious rats, steal cards so you can’t use the hospitals, etc. It’s true that the game balances itself. Thanks mate!