Very well designed, even as a mockup/prototype. Seems really fun too. Huge +1!
Ships are surprisingly vulnerable to tanks when they come close to shore. From personal experience in custom matches, you need a high-arc, direct High Explosive hit to roof hull area with a 120mm+ gun from a ship to destroy most tanks in the game. And that’s IF said tank stays still long enough for you to land the hit should you be 5-15km out.
Getting closer than 3-4km to use fast, accurate shelling is dangerous for anything but heavy cruisers and battleships because the hulls and turrets of everything else just don’t have the armor. And even with the heaviest armored ships, you don’t have the fire rate or ability to direct each high-caliber gun onto a different target in order to pin-point apply AP or HE shells through the weakpoints of tanks, while they can pummel your turrets, bridge, engines, or obliterate your crew with impunity.
I really hope we see something like this as some sort of test event. This is probably the best GRB mode suggestion I have seen and would be extremely fun, especially at top-tier.
If this gets passed to the devs, thеn there might be a chance.