Now we have the 3.16.6 kernel from Core 6.x release candidate, ony change was to enable devtmpfs that is needed by systemd. Here is a copy of ub-dCore-utopic with the 3.16.6 kernel for those who wish to test, it works for me in what I use dCore for. This kernel was built on Core 6.x, I plan to keep the kernel the same build as standard Core so Core and all the dCore x86 ports can share any new kernel module extensions as well as have the advantage of the wider testing base with everyone using the same kernel build.
http://tinycorelinux.net/dCore/x86/release_candidates/ub-dCore-utopic/