Yup. The brothers are keeping Doyle close so there's no rush. Maybe there's other things he might be able to share with them about Nucky's businesses??? But as mentioned, I think he's excess baggage now that they've allied themselves with Rothstein/Luciano/Lanksy. 
"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming
Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.
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