Not an option for casual players. A casual player does not want to or cannot harvest just in time each day. That's the definition of the casual player.
For a casual player, the shield is really expensive. 9000 silvers for a single day protection? It would require ~6 full table collections in a max level tavern. Definitely not a long term solution for a casual player.
3. Aiding (trains, hippodromes, ...), including self-aiding
Noone has enough self-aid kits for this purpose. Casual players usually not members of high level guilds and have no 140 friends. So their city is not always fully motivated becasue they receive motivations mainly only from neighbours.
4. taking buildings off the street
Really? That's not a solution, because they do not know when they can log in next time
It could be only a solution for a vacation weekend. But not a regular solution for the everydays.
My most concern about the new building is, that it is far smaller as the Atlantic Museum. Make it the same size and same price in goods as well as in FP and I´m (almost) okay with it.
Atlantic Museum is used by advanced players. This new GB will be used by casual players to protect themselves. (Note: advanced players won't build this GB because they harvest just in time
) So it's logical to make this GB cheaper than the Atlantic Museum.
Summary: Remember, most players in this game are casual players, who do not have a perfect city and they cannot harvest just in time. They just would like to go throug the ages and they don't want to camp in a specific age for years...
I think it could be really frustrating for them if their buildings are continously plundered becasue there are always some OP players in their neighborhood, who plunder all their neighbours each day.
This new GB may be a solution for these casual players to do something effective against plundering.
So please stop complaining against this new GB. Plundering is part of this game and will remain part of it. This GB won't give a 100% protection. It will give only a chance to fight back