The two issues are kernel age and volume of devices. In dog/internet/linux years the 3.10 kernel is prehistoric and because it's missing so many now-fundamental structures it's too challenging to backport things. The 3.14 kernel is marginally easier, and unlike 3.10 there are a ton of devices using it, so community developers have made the effort.
NB: The second we have mainline kernel support for Amlogic devices, anything that cannot run mainline will have official support discontinued. The full scope of affected devices is not clear, but WP1 with the 8726MX chipset will definitely be dropped. Current ETA is post-Leia, so it should survive until the LE 9.0 release, although no promises.