His introduction chapter was pretty cool I liked it. I think people are rushing things though.
For example, Rayleigh didn’t actually do anything besides save Camie until X chapters later when they went to his house. Combat wise he didn’t do anything till near the end of Sabaody
If I had to guess 1 of 2 things will occur
1. He sits out the entire arc and the Strawhats meet him at the end to either collect the last poneglyph or find out where the man with the burned marks actually is
2. He becomes a moving piece when Colon is kidnapped or Ripley is injured
But it’s Oda so he’ll probably throw a curveball