I'm not sure how any of your links prove that Booker isn't a party-line guy. There are always a few aisle crossers. This is unremarkable.
Yeah, he voted Yea on PN55, but not in the way you're implying. From your own link it says: "Neil M. Gorsuch, of Colorado, to be an Associate Justice of the Supreme Court of the United States—a vote to keep the Senate precedent of requiring 60 votes to close debate on Supreme Court nominations." He wasn't voting to confirm Gorsuch. In fact, he voted Nay on the confirmation vote. Don't be disingenuous in an attempt to defend your new boyfriend.
As far as Booker and Christie meeting in the middle goes, those two allowed Mark Zuckerburg to throw some money at some schools. It was an obvious PR stunt that made them both look good. A clear political maneuver.
You're kidding, right?
EDIT: Hash beat me on the Gorsuch bit.