I think for a system like this to be successful one probably needs to replace the capital capture for “all the cash” dynamic. Even now, the only merit it really has is for game resolution purposes. In my view it is a hold-over from Classic that continues to undermine the VC system.
Unfortunately Europe 1940, has the capital capture dynamic built into the very first round, so you’d have to come up with an alternative system that keeps Germany viable without that French purse. A same time system like the one I was trying to outline, you’d definitely need some new rules to address that mobilization issue for G40, since it comes up right away, unlike Revised or AA50 where you could usually just call the game at that time.
Good point