....which are directly related to maps. USF late game is very mobile and hard hitting, but when all the maps are small and easy to lock down then USF late game is shit. Soviet late game isn't in as dire straits due to indirect fire but still you get my point.
Fixing maps should be the top priority.
It's easier to set up a defence that perform a multiple front attack and flank.
It's easier to control 2 tanks, than make use of 4-5 mediums. The average joe won't be able to make use of them and it's a problem when the games goes arounds tanks and pios mostly. Alpha damage during late game can get really scary.
3v3+ CAS is really broken. Resource inflation + global presence on big maps, makes retreats really punishing.
Mid to high level of play is balanced. Unfortunately mid to lower isn't (higher modes).
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@ElSlayer the game is not designed for 3v3+, but that doesn't mean there shouldn't be balance changes to make it more enjoyable. Some of the reasons this modes are imbalanced are due to the things people likes about them:
-Resources
-Amount of units
-Capping