An interesting observation for the devs.
I do not know why, but while the game/slowness/403/4s are always existing pre/post 7-8am EDT they are not as...."Oh my god please kill me now." all the time. But between 7-8 am EDT there's about 5-10 minutes maybe less maybe more of practically unplayable game where almost nothing works except for chat then after progressively until my night (about 6-7pm edt when I go to sleep) all the issues described in this thread become significantly worse. I do not know until what time but they are back to..."normal" slowness when I wake up until again 7-8 am edt around 2-3 pm my time.
Dunno maybe this helps devs somehow, maybe one can wake up early login the server and watch this happen live, maybe it'll provide more info? lol dunno.