Who is at fault then? Are those players less important than the prime time horde? As it stands an entire continent is basically being written off. People are getting frustrated and logging off. There should be a way to accommodate them.
I dare say most players have no idea what the other 21 hours of they day they DON'T play are like...
While that might be the case, 2 sides isn't the way to do it.
When I think of games that have two sides, I think of Call of Duty. For those who don't know, it's typically matches of 12 v 12 . Sometimes you would have players switch to make a slightly lobsided match like 9 v 15 . However, quite often, it was 18 v 6 or better, and the players did it for various reasons. Being a jerk, score (win/loss ratio

), etc.
I personally think a good solution would be to limit what bases players could take off from, and make it so they could only take off from bases more on the front lines or closer to each other. Making the bigger maps 'smaller', by limited the bases you could take off from, would make finding fights at late hours (or off peak times) easier.
Edit: Interesting, while looking for an old post of mine with screenshots of the idea. I found this.
http://bbs.hitechcreations.com/smf/index.php/topic,300387.0.htmlWhile this was discontinued if I am not mistaken. I think it has merit here for this topic. (Note: not my intention to hi-jack but to me it relates to the topic and is a possible solution.)
Instead of 3 areas, like in the link, why not have 1 'off peak' arena, and one 'prime time' arena, that run on a similar clock to the link above. The 'off peak' arena would have small maps only, or small/medium maps. And the other would be what the rotation is now.
While I can see some cons to it, I won't bother writing an article on it, but I'll let you guys munch on it now that I thrown some potential new meat.. but what do I know, it could be just air *shrug* .
