Several times I've joined posted missions and when launch time comes everyone gets a message that the plane is not available because of ENY. Major Bummer! General Mayhem!
How about a warning message several minutes before launch to the player who posts a mission that ENY for the plane prevents its use.
Also, I suggest if ENY for a particular plane is borderline but still available, and a mission is posted with that plane, that the selection be good for five minutes after a change in ENY would normally prevent use. If the mission still hasn't launched in five minutes after the ENY change, then the mission poster gets a warning message saying the selected plane is not available.
Kinda' frustrating to sink several minutes of planning into a mission, or to wait 7-8 minutes for a mission, then have it shut down without warning by forces beyond your control.
Best Regards.