We're one week past the close of the merge window for the Linux 3.16 kernel so the changes now mostly amount to bug and regression fixes. Linux 3.16-rc2 isn't particularly unusual and Torvalds noted when it comes to code changes the SPARC and Nouveau changes were heavy. The SPARC changes though came down just to warning clean-ups while the Nouveau DRM changes were just about small firmware fixes.
For Torvalds' other thoughts on 3.16-rc2, read his release announcement. The Linux 3.16 kernel overall is shaping up to be quite exciting with features like Nouveau re-clocking. I've already written at length about new features and improvements for Linux 3.16. More Linux 3.16 benchmarks will be coming next week.