I think those who burned the XP boost should be compensated, but otherwise… you aren’t paying a sub, so what is there to compensate? You can still play the game.
Yes, they definitely need to extend the stim at the very least. If they don’t I will be surprised considering how long this has gone on.
I know when similar things happen in WoW they have credited a day or more of game time so a stim extension should not be out of the question.