For flying achievement?
I agree it's a bit of a knee jerk reaction, surely a better solution would've to make the invasion timers identical to the previous Legion Invasions like everybody expected so nobody misses it BUT I don't understand why people are complaining about those unhappy with the Invasions... Invasions was a core feature of 7.2 and Blizzards choice of timing is inexcusable (EU apparently was 3am-8am today) so something obviously needed to happen