I agree with the author. Someone said in the early game it is too strong. In the early game, it is just enough to balance the privileged player. Usually, people get 2 cities with a total of 20 dice results that gain something. But sometimes the first player goes to 23/22. The robber is the way to prevent him from dominating the rest of the game. His first city will add +10 when everyone else will not be able to stop him easily now with a robber. If he goes to a metropolis, he will add +13.
For example, 8, 9, 5 = 13; 6, 10, 4 = 10 (total 23), if someone didn't understand what I am talking about. So, the rule breaks the balance of the game.
For example, 8, 9, 5 = 13; 6, 10, 4 = 10 (total 23), if someone didn't understand what I am talking about. So, the rule breaks the balance of the game.