"The third change is a new tier 1 naval trait, which increases the chance of blocking the missiles/nukes of a nation you’re blockading by 10% (this is multiplicative to the current 30%/25% chance)."
Nukes/missiles should not be nerfed more. They are the only units half the combatants can use after the first round. Unless the point is to encourage people to not log in after the first round of war?
i suggested this a while ago (but in regards to AUP at c15-16) however the activity center should disable after the city cost project is purchasable (so after c21) it currently creates a weird incentive where players sit on manifest destiny for 5 days, then buy c16(or c21 now) and then immediately buy the city cost project at the same time. I suppose the costs are negligible and you are arguably losing the income of a city which is worth more. However AC is guaranteed income so if a war breaks out you have that no matter what and so it's just safer to not take the risk unless there is a global nap and you know you're safe.