Premise: Here is where ENY could be HELPFUL. Unless the ENY limit for a country is high, the downtime of factories would be short, and really not worth the larger country's attempt to shut it down. Based on supply and demand, when a country with higher numbers in flight, has its manufacturing stopped, stock dries up faster.
What will be changed from current system?
1) ENY no longer automatically limits types of aircraft
2) Each strat is now tied to manufacture of certain late production and limited production aircraft
3) New Server message is generated to identify the area of manufacturing that has been damaged, "SYSTEM: Knight Grumman manufacturing has been halted." Effectively Knights loose ability to fly Hellcat and TBM for duration determined by the ENY multiplier.
4) New system of classifying strategic target benefit. Examples: Merlin ~ P51 D, Lancaster, Messerschmitt ~ 262, 163, 109K4, 109G?, Lavochkin ~ La7, Mitsu ~ Ki-84, etc....
5) ENY multiplier significantly enhances the effect of strikes done by undermanned countries, while keeping level country downtimes to a tolerable 10 minutes, with the ability to resupply sooner.
Desired outcome: Game play is more immersive. ENY is not automatic, players initiate the damage and are rewarded with perk points, and server verification of successful war effort. Mission Planners are warned before launch that aircraft may be removed from their hangars. Most important is a country balance tool that is forgiving in offering reasonable alternative aircraft.
* Note: I believe that most players currently DO NOT CHANGE SIDES TO BALANCE ENY, they log off.