Naval bot AA was buffed to a point where it broke the mode for anything but bluewater ships.
Naval already faces fundamental problems of questionable game design with e.g. destroyers and coastal boats being thrown into the same match but with one group completely outclassing the other.
Instead of letting destroyers spawn on the opposite side of the map and turning the middle capture point into a mixed territory destroyers can typically spawn shortly behind the coastal boats, often being able to shoot enemy boats directly from one spawn into the other.
It´s not without reason that most destroyer players immediately head into the coastal boat zone as it´s compareable to move a 8.0 tank into the zone where only Rank 1 tanks are fighting each other. Once you reach it you can start the clubbing.
The only real solution to this problem for coastal players was to rely on the rock paper scissor mechanic of destroyers beating coastal, coastal beating planes and planes beating destroyers.
This did end in situations where skilled bomber players could erase multiple destroyers with their bombs and was only balanced by the fact that the opponent could do the same. It also gave fighter planes a real purpose to also be played in this mode.
Yet now even early destroyers have super accurate AA guns on their decks that don´t require any active human participation and the only remaining factor was removed that prohibited destroyer players from deciding matches on their own.
The problem sort of changes the higher you go in bluewater ranks when AA becomes massively more prominent on ships. On one hand coastal boats only get played very rarely in higher BRs and the slow & larger boats completely disappear but as a pilot you´re lucky when you manage even a single approach to drop your bombs. It´s an entirely kamikaze move and experiencing AA in WT makes you question how planes like the Swordfish could ever land a hit on a Bismarck.
As mentioned before naval has fundamental game design problems that need to be solved but the solution to overpowered bot AA would be to lower the effectiveness of AI AA on ships against planes again. Either to the point where it mainly serves as an indicator for the player that a plane might attack him and he needs to switch to manual AA control in order to fight it off - so an actual skill factor becomes important - or to a point where they can sporadically hit, but not nearly as fool-proof, as they protect unaware players now. Possibly a mixture of both.