Now, i know that this will be unpopular in terms of making money off us, but i am writing this with players POV so …
What i am suggesting is : when your campaign level for one side is higher than the other the one with lower campaign level gets exp boost until it catches up. For example: your soviet campaign is at level 10 and German is at 4, German campaign gets an exp boost. Higher the level difference - larger boost.
IMO it would be an incentive to diversify and play for the other side.
That sounds like a great idea. We definitely need more reasons to diversify than getting bored with the same maps.
Problem with that alot of People tent to Grind 1 Faction before starting the next. That would mean these People would have Exp Boost al the way to the End with there Alt-Factions.
Next Problem would be Premium Account which gives you 100% more Exp if you would give Prem-Users another 50% there Levelingphase would be super fast.
I think since its a F2P Game and in most games likes this it works really well are Exp Events / Weekends. These type of things would have to be in regual times like every xx weeks / months so the constantplayer base has something from it but it also invites new players to the game.
I’m not receiving Exp for the Invasion of Normandy but I was receiving Exp for the Battle of Moscow