I haven't played yet so im not able to judje but i think that you should keep some changes like consumamble oxygen and oxygen regenerators. . If the hydrophones of dd's reach seven km submarines will not be able to perform because their torpedoes have limited range. The effeciency of he shells bombs and rockets and anti-submarine aircraft as well give the chances of the biggest ship to fight a dd. There is also no change at the tiers as i see from the description. I mention that because in the previous site you have shown us that there are tier 6,8,10 submarines. Anyway these changes seem fun and i hope they will improve the experience of the game
