Once again I have no problem with your choice of changing countries (IE: To Help Balance the numbers, if that your intent), but ENY does make a big impact on the dominant country ability to attack and if lets say 25 of you like minded members change to the lower populated country of which is enjoying a low ENY until you showed up (of course it depends on the total numbers on line across all three countries), "keep in mind this just a example", now that counties ENY either goes up or the dominant countries goes down which now counters the purpose of the ENY and gives the dominant country the ability to up the more effective planes and vehicles now. So under those circumstances you are not helping as much as you think which is one of your arguments about the time limits, the other point you made is to be able to fly with a friend that's in a different country or something to that effect of course a few people doing that is not going have any great impact to anyone and once again I don't have any problem with that either. So increasing the time to whatever amount above what it is now may help more than you think lets say 2-hours.
Now I see their has been a reference to spying, well that is not where I'm coming from, I was talking about people do this to game the game and everybody has seen or had some type of interaction with this type of player, most of the people in this game achieve their skills and objectives without having to stoop to that level of game play, you are not who I'm talking about and it is unfortunate that some ruin it for the others.
I also would like to say that the people that do this with the best intentions (I take my hat off to you fellows), but this is still not the same as a nonbias automatic function of the game such as ENY.