I would like if they added division management, what I mean about this is that instead of selecting ships to form task forces being able to create divisions in port and assign them to task forces would be a lot better. I like to play with really big navies. my biggest issue is when I play battles with a large taskforce the divisions mixed different classes of the same ship, for example in one battle it mixed a fast battleship with some dreadnoughts in a division and having to transfer create or disband divisions on every match is tiring. I think creating divisions would be a nice add since when you jump on a battle with a task force all the divisions exist to your liking and then you don't have mixes of fast and slow ships on the same division.
Divisions should be created in ports or in taskforce screen. They can receive any class of ship as long as they are the same type (battleships only battleships, destroyers only destroyers, etc.) division can be transfer to taskforces but you will have to wait until they reach the task force. divisions are loaded in to battle as assign (I think this will also decrease the loading time since the game will only have to place the divisions and not creating them from 0, I am no expert so please let me know) last two things are important, a screen with active taskforces and divisions to keep tabs on them. finally adding filters to the fleet and design screen since like I said I like to play with huge navies having filters would make the game easier for me since I can keep track better of the fleet and the designs will be also good since I also make a lot of designs.