Sadly eu is more southeast asian player base lol even if they make them one hour earlier is still pretty late for most players since they work next day. Best would be if they make the bosses before clique battle time so 1400 or so.
Agree with Noob, either you make world boss at around tdls 1400 svt time, or don't change it. One hour earlier only gives convenience to those who ticketed, which I see it as an manipulative act.
GM try broad and ask this matter in game, and check the system chat reply one day later, perhaps on a sat/sun. Asking in forum when forum is inactive is futile (most players do not check forum as GM/Mods are inactive here).