Caplehon II was the best questline in the game.  Now it's gone.  And there's no reason to interact at all with west Calpheon, which is the most unique and diverse area in the game.

In terms of revamps: The Balenos questline is about the same in terms of how I feel about it.  More is explained, but it feels too forced and contrived.  Serendia is WAY better.  You really get a good feel for the place, and the people there. Calpheon is a 1/100.  F minus.  Really bad.  Everything is forced, it's really janky, it seems every Calpheonean is an evil person, or is willing to commit evil acts for their own agenda, and the final sequence made no sense at all.  And the layering of the instances over the city was very poorly done and felt very unimmersive.

So, yeah, you did a great job with Serendia, PA.  Rework Calpheon, please.

And restore Calpheon II.  Serendia II is a joke in comparison.  A huge anti-climax from the Jordine saga and a worthless way to introduce Kzarka, the coolest boss in the game.