Its b/c the closer he gets to the endgame, the less chances he has for character updates and the state of an event. Before he probably just had a "lose" idea of where he wanted to go with everyone, figuring he had tons of things to do still.
Now its more finite, so he includes characters who are going to still be relevant in the near future, i.e.:
- Revos/Dragon
- Kuma
- Law
- Kid
- Blackbeard
To name a few for now, since Elbaf and Fullalead seem to be in the running for next islands.