I'm not sure if I understood the system well enough, but to me it looks like Warfronts happen on a schedule. So a player logs in and the warfront isn't available for the next hour, for example. Or it may be available every 2 hours.
I think this kind of content would be a mistake, because I've experienced it in Guild Wars 2. They did this a lot in earlier zones / expansions and I'm glad they got rid of it with the newest xpac. It's just not fun to wait for having fun.
What do you think?