The erasing itself didn't bother me much but that they made it look like it didn't change anything? That frustrated me to no end. If they'll insist that there's no Peter and there's still a war between 2 universes and Walter still went there and ruined the balance (actually hpw could he if he didn't stole Peter?) i cry foul cause they're rewriting their own canon.
And since i watch this show only for JJ i'm afraid he won't be there enoough. Cause 2 minutes in the ep as a ghost isn't enough for me.