I dont know if this is a bug or by design but Berkshire Palaces extra arrowslits are way worst than the standard ones. Standard is 12 damage on 0.5s attack speed, the extra ones are 10 damage on 2.62s attack speed. The extra weapon range works on all of them as intended. The landmark also has 20 garrison slots instead of the standard 15, but this can actually be a good feature, just need to be on the description.
This is by design as far as I know, but I’ll pass this by the balance team just to be sure. Thanks, @vcpinheiro14!