Gaban butchering Sommers then getting hostage-diffed is fine, he showed what he can do against a Holy Knight 1v1, he can take Gunko's attack and leave saving his son to the Straw Hats. He did enough, if the Future Sight reveals are true then that's amazing, very fitting and I like what that suggests for Sanji's near future.
Dragon making moves and getting stuff done sounds amazing. Blackbeard will probably get involved somehow soon if he isn't already given he wanted to capitalize on the situation last we saw him. Imu taking over Gunko sounds nice and I'm excited for where that goes.
I don't really care for the idea that Brook knew Gunko in the past, but I like Brook getting focus so that's nice. Hopefully, like Robin, he gets some spotlight this arc. If so, all that's left is Usopp, the rest usually or will get spotlight soon enough.