Endwalker was a great mess(SPOILERS)

[Divinemights]

Time travel is a recurring motif in the Final Fantasy series, which focuses on carrying people through time and possibly allowing them to change their fate.
In the Shadowbringer, G’raha is able to stop 8th calamity by sending himself and the Crystal Tower to the First; therefore resulting him able to avoid the paradox (There was no Crystal Tower on the First).
G’raha’s involvement has created three ripple effect that avert the catastrophe.
The absence of the Scions from the Source because of his summon resulting a standstill between Erozea and the empire and delaying the Black Rose depolyment.
Tataru Taru was forced to call up Estinien resulting him into meeting Gauis to join forces in sabotaging Black Rose facilities and further delaying the deployment.
As WoL got pulled to the First and prevent the Rejoining of the First, this also further weapon Black Rose’s effect.
Entire timeline has been altered, therefore 8th calamity has been avoided

Our travel to Eplis however is different because we did not alter anything and we are basically replaced original seat of Azem’s involvement in the creation of Hydaelyn and Zodiark.
Since the beginning there are 6 players involved in Ktisis: Meteion, Emet-Selch, Azem, Hermes, Hythlodaeus, and Venat and only Azem and Venat walk out of Ktisis with their memory intact.
This is further support by why Azem defected the Convocation and also refused to join Venat’s Hydaelyn summoning.
WoL is merely replaced Azem in entire event.
If WoL didn't show up, Azem will show up on Eplis either way. (even WoL got killed at 8th Calamity)
There is no paradox and nothing was altered.