So another thing that need to be fixed is that nations get very very very low XP for naval combat - it reflect only lenght of naval battles without any difference if both sides have 2 small ships an nothing is sunk or if both sides have 20+ ships and winner destroy 10 CVs and BBs.
As USA I just wiped out 90% of IJN in 3 weeks and when I looked to Research tab my Naval Combat XP was 0.6 which is absurd.
IMO when combat XP are calculated it should be important how many ships are in that battle and you should get extra XP for each ship you manage to sink (for example 1XP per capital ship and 0.2XP for every escort/sub you destroy)
As USA I just wiped out 90% of IJN in 3 weeks and when I looked to Research tab my Naval Combat XP was 0.6 which is absurd.
IMO when combat XP are calculated it should be important how many ships are in that battle and you should get extra XP for each ship you manage to sink (for example 1XP per capital ship and 0.2XP for every escort/sub you destroy)