I'll post here since the wishlist thread is quite old. An encyclopedia with each national army, accessible from the main menu only, would be very helpful to familiarize yourself with various platforms etc. over the course of playing the game. Failing that, some kind of pdf document which lists units by their nationality and features would be a good substitute. I'm not the only one to suggest it, but the last time it was brought up was in 2013 so I figured it was worth restating.
Eventually a campaign revolving around a Second Korean War would be nice for a different theater and new combatants, but that's a future game! Figured I'd throw it out there anyway. The only other things I've noticed is how counter-battery settings on arty seems superfluous, and, I might be mistaken, but AT weapons (RPGs etc.) seem quite rare.
Otherwise, it's all been said before from what I've seen, which is good! I would also like to emphasize that the abstraction of this game is, imo, its core feature and shouldn't be messed with overmuch. What really drew me in is how I could concentrate on the flow of battle rather than the micromanagement of various units: I've gotten enough of that from "wargames" like Eugen's Red Dragon, AirLand Battle, and European Escalation. It's not what a commander should be doing.
Case in point, Red Dragon has ended up at a point where if someone's M1A2, for example, is destroyed by an airstrike people will ragequit. Not the experience I thought it would be back when I first started with EE in 2012. This came about because the devs listened to suggestions for unit inclusions, which is fine until it enters the realm of prototypes. Some, like the Super Patton, made sense if just for fun. Others, like the aforementioned M1A2 with its 1992 year listing, were included to satisfy certain lobbies. Point being, it's the kind of result possible when the playerbase exerts the wrong kind of influence over a dev team. Shiny toys are given rather than improvements to the core experience, and the former results in the detriment of the latter. The team here seem aware of this threat which is to their credit. I don't mean to lecture, just reporting what I've witnessed elsewhere.
Red Storm isn't as graphically impressive as Eugen's titles but makes up for it in spades elsewhere, and it's impressive for that reason. Well done! I look forward to SS but will enjoy RS in the meantime.