- Better AI. Yeah, I know this is a bitch and a half to do, but I still want it.
- Better war objectives. Yes, this is a game of the only really total war we've ever fought, but there were enough cases where nations stopped short of total conquest(Vichy and the Winter War, in particular) that we should have some partial-conquest options.
- Something like a (very simplified) version of Vicky's POP system. There should be a tradeoff between manpower and IC somewhere along the line, because IC isn't just physical factories, it's also the people who work in them. This will also allow women-in-factories events and other things of the sort. It'll also help with things like the pre-war Balkan land-grabs, partisan mechanics, and postwar cleanup(This province is 40% Hungarian and 60% Romanian, so both want it. After the war, just move the people out until the border's easy again).
- In the same vein, add food as a resource. After all, that was the biggest issue with the Battle of the Atlantic - the UK was basically self-sufficient in basic resources, it just couldn't feed itself.
- Resource flows should be made a touch more realistic. I don't want to go full Railroad Tycoon here, but if I have a sizeable colony(e.g., India) with its own resources and IC, it should be able to produce its own supplies, instead of having to ship everything to the capital and ship the supplies back.
- I prefer a HOI2-style system of doctrines, where you actually have to choose instead of just getting all of them.
- Intelligence(in the sense of seeing stuff on the map) needs to be reworked a lot. Radar giving a god's-eye view of whole countries while the Military Espionage mission seems to mostly just tell you a handful of units they're producing is silly. Even just adding a few tooltips so we know the interaction between decryption, radar, and spies giving a view of the enemy units would be helpful. Espionage should also give you a sense of their whole order of battle - i.e., go back to HOI2's "We think they have about 100 Inf brigades".
And because every one of the above would make the game more complex, here's a couple to simplify it down.
- Remove fuel, go back to simple oil. The refinery step adds nothing.
- Go back to transports and escorts being duties for destroyers and transports, instead of separate units.
- HQs should be paper units, not ones with a physical presence on the map. You should not be able to have a group of clerks moving faster than infantry and capturing territory.