Is the twist important?

I'm planning on starting this module later this month, I'm reading over the book now, haven't read it since release so re-familiarising myself with it as I go. Is the twist that Zybilina is Tasha at all important to the campaign or is it just a case of WOTC dropping an important lore character in to stroke their own ego?

I'm thinking of dropping the twist entirely if it isn't relevant and just wanted some additional perspective.