I did like Ulala and Baofu at times but I think Ulala peaked far too early with her Joker. After that she's largely just Baofu's love interest or there for comedy.

Overall, I think a big reason I like 4 and Innocent Sin the most is because they are the ones that focus most on the bond between the heroes. EP's cast feels more like 3's - a group of people who might get along but aren't necessarily so close they are practically family.

Also:

When Philemon said we would save the world by removing the group's memories, I figured that meant we were retconning the game out of existence, not just creating a parallel world. That's the point - our heroes sacrifice their memories for a better world and to undo all the damage.

But the existence of two separate worlds, one where the world is still destroyed, negates the entire sacrifice. No one was saved, all you did was create a bunch of people to replace them.