I think that eventually someone will figure out a pattern and be able to predict the next TZ.
But here’s my main concern and I would like your feedback on it.
Remember when the 1st Diablo clone event was planned? The servers crashed and a lot of people could not even log in until the event was over.
This happened again until people stop caring about annies. If popular tz like cow level, tristram, arcane, cs etc are active, players will rush to play on these hours and may cause issues for players who just want to play normally. Remember, asian server players can all migrate to EU and USA servers and vice versa 