They would only be able to play it once a day, which defeats the purpose of this being the american version.
The american version is made for american players, not for everyone else, although everyone else are welcome to play
It would be unfair to do events that US players can't join.
Well ya know, it's GF english and not... GF US.
I would say there are enough Euro and Asian & Oceanian players to warrant better, more frequent WB times.
With that said if you are having trouble with WB times, I have found Grand Fantasia Indonesia
to be have times closer to my normal wakeup and sleep time. With that said, the site will be difficult to navigate.. unless you know Indo.. or have a good translator