Umm ok. And you think forcing 100% of the people to log off and fight for the last slots of your squads server somehow better?
...than people randomly disappearing and reappearing? Much, much better.
By the by, what happens if you try to log into your squad's server after things have been split and it puts that arena's numbers over? Does your squad get relocated to the other arena? What happens if half of all the squads assigned to one arena show up at 7:00 EST, then the other half of all of them show up at 8:00, doubling the numbers in that arena? How do they get reallocated?
You're ignoring downsides that are game breakers, Ripley. It's not 'just that simple' and 'oh, people won't notice'. Squads moving together? Great. One thing you'll generally notice about squads, is they have a tendency to fly in the same area. 6 or 8 planes disappearing at once from a battle is not something people will 'just think is a random disco'. It will significantly affect gameplay, for the worse.
Currently the whole war is stopped and squads get separated. Not good.
And it is still susbstantially preferable to people popping in and out randomly.
Since no arena is filled to the max after the split,
Wait, what? So it keeps creating new arenas as more and more people come on? So eventually you wind up with 4 or 5 servers because you had many people logged in at one point, but because there's no mechanism for the arenas to reconsolidate, as they log out you wind up with 4 or 5 servers with 20 odd people in a couple of them?
Oh, but
people can consolidate freely back to the other arena if they feel necessary. That would only happen if the other side would get way too empty for some reason.
...like people logging off after a couple hours. This would happen very often.
With a 50% split there's no logical reason to want to go either side (given that squads are preserved on same side naturally),
What about squads who enjoy working together?
Really, I'm 100% sure people wouldn't even notice the whole change they'd just think the opponent had a random disco.
If your idea requires that people 'wouldn't notice' stuff happening around them, it would never, ever work in a game design.
Wiley.