@relentless Thank you so much!
And one last question: when setting restrictions for match, I can disable T4 Artillery for all fractions, but this also disables the FatBoy for UEF. I can then reenable FatBoy manually, but why fatboy is treated as T4 Heavy Artillery?

Sorry for late answer,
Yes, base AI (or AIx).
Example of replay, shared in my onedrive
https://1drv.ms/v/s!Am45CW6imGAahN0x_asQBgt0FMlMlA?e=XHaa1B

You can easily see this behaviour in any battle vs base AI (AI or AIx with any Naval expansion level)

Hi there!
Recently there was an update in FAF that changed AI gameplay regarding naval. Now the AI is building naval factories like insane. AI is trying to cover all the available space in the sea with factories and then the game slows down. I like to play vs AIx a lot, but naval update for AI made the game worse. I am setting Naval expansion to None to mitigate this problem. Please, return the default behaviour for AI in the sea!