たぶんこれだな。
Googl翻訳から推測だと、Hero's Becomingという新しい道に置き換えられたけど、そいつは新規プレイヤーしか出来ません。既存プレイヤーにはなにか補填します。みたいな感じだろうか？
As you've noticed, the Path of Domination has been replaced by The Hero's Becoming - a new path of quests for new players.
As the new quest line is only available for new players, we will send out compensations for removal of the Path of Domination later today