When they talk about how the EA segment of the game has been reworked I hope it's our onboarding for the goblin route.
Im affraid you are corect ...
From gameplay in shadowlands we have seen in last PFH, narrator clearly states that if our character will join Harpers and attack Drider, they "blow their cover" ...
So it seems like Goblin route was decerased to meere infiltration.
Shame our character cant be genuinely interested in joining the cult, isnt it?