I can see where all this is coming from, Brook is an odd bird amongst them, but it'll change in an arc or two. the same way the during Skypiea arc Robin was distant from the team. Brook needs a bit more time to in the group.
I wonder if Luffy still has any 'fear' left from the WG, after the judgement island incident. before it, I had the feeling that Luffy is 'intimidated' by Aoikoji and the other admirals, the way the Robin is afraid of the buster call. but now?
I don't think Luffy even cares for them, he knows where he stands and how he fares.
he has a big ass crazy new top notch ship, his crew racks 600 billion in bounties, he himself is the ranked the 2nd most dangerous pirate on the island. how much does Luffy care for what the goverment throws at him?
edit: continuing what I wrote last week, about the strentgh of Jinbei.
Chaoter 69 page 08
"Arlong is the mermaid pirate who is as strong as Jinbei, one of the seven gods"
that's what the text says. not me.
as strong as. in my book, it means equal, or almost equal. I'd even give Jinbei the benefit of doubt that Arlong is the first officer, and therefore, has the same ratio if strentgh with him as Zoro has with Luffy.
next, if we judge strengh by bounties (which is how the goverment measures the pirates) we can assume the if Luffy got a bounty of 30 Mil by beating arlong, so arlong's 'power' was around the 30 mil himself.
Luffy's current bounty is 300, and Zoro's is 100. the other Pirates said that luffy is special for having a subordinate with such high bounty. the ratio between the captain and the first officer is 3:1.
now, we can agree that Arlong's 'bounty/power' was around 30, and even if he's not 'as strong as' Jinbei but only an exceptional first officer (notice: at this point, I'm already bending the cannon text) Jinbei's bounty will be 3 times his own (30*3=90).
play with the numbers any way you want (and remember that each time you're stratying further away from the manga source). the end result will be that Jinbei isn't something to get too worked up about.
even if we double Arlong's supposed bounty and quaddruple (X4) the ration between him and Jinbei, the bounty will still be less than luffys ([30*2]=60*4=240<300)
regardless of how much I rape the text (and how fun it is), it's just hyperbole to back my opinion that says that the SB aren't as influencial as they were before.
(before I continue, a few words: I know that Math doesn't proove anything, etc etc etc, that anything can happen in OP, blah blah blah, bounties aren't energy levels, yada yada yada)
the fact that they recruited Blackbeard and that Kuma came to save Moria is enough evidence for this, the Goverment is greatly weakend now.
last words concernning Jinbei: since nobody seems to think that he has a devil fruit ability, and some of you say that he is probably 'the strongest mermen of all merman' what chance does he have against Luffy? a super merman vs luffy's 3rd gear in terms of pysical power? Luffy so far fought against two SB with logia defence and against Enel (super speed\evasion abilities), and despite the dissadvange against Croc and Moria, he won. what chance does Jinbei have?
that's it, for now.