Torvalds wrote in the 3.14-rc8 announcement, "I delayed things a day from my normal schedule, hoping I'd feel more comfortable doing a 3.14 release, but that was not to be. So here's an rc8, and I expect to do the final 3.14 release next weekend. There wasn't that much scary stuff going on, but there's a few vfs fixes still pending, and we did end up having some interesting core fixes last week too (not new regressions, but newly detected by Trinity). There's also some networking fixes and random noise (mainly MIPS). So I really wanted another week before release after all."
As a result, the first Linux 3.15 pull request will have to wait. The week delay should also be fine too considering that many key Linux developers will be out this weekend to Napa Valley for the 2014 Linux Foundation Collaboration Summit.
There's many features and improvements to Linux 3.14 but already we are looking forward to Linux 3.15.