1) The servers are based in NA.
2) The majority of the players are in NA.
3) The least amount of traffic in the game, overall (NA and EU combined), takes place during the new timeslot.
Three pretty strong, fact based reasons.
1) doesnt matter marketed as international
2) doesnt matter customers should be treated equal
3) doesnt justify screwing us over on every possible occasion and then denying it when confronted about it