Raids in the style of CLL or Dalriada are cool.
Raids in the style of DR or DRS are cool.

Repeating BA seems an odd decision when the above two examples worked well.

I still think we need to see how it goes though because BA itself became a lot more trivial over time once a significant amount of people had fully augmented elemental gear, bonus accessories, logos actions, raid leaders that fully coordinated and called out the mechanics, and other advantages.

I don't know about the 144 people issue but it seems like it's causing a lot of issues working like BA but not allowing the amount of people in that Eureka did.