As someone from outside the USA, as much as I love live action, for me and probably for others they can be rather impractical depending on timings. When I was a student, staying up till 4am or whenever to keep up with USA timezones was no sweat. But now I'm in work, it's harder and harder to try to stay up until that sort of time so people in the USA can run their JPs in their evenings (which is when everyone naturally wants to relax and unwind).
I really feel for the Aussies of the site, given I've heard horror stories about them trying to keep up with other timezones. But, there's no getting around the fact the vast majority of the site members are based in the USA rather than scattered more, so whether it's actually worth reducing the amount of live JPs to accommodate international writers a bit better is actually a question all of its own. I don't want the method of plot execution to change for a minority if keeping it the way it is, is better for everyone else. But to sum up, I'd love to have more international-friendly JPs, obviously xD