A custom kernel has been released by XDA developers that features A53 Overclocking; Sweep2sleep; init.d support, USB Quick charge, Disable SELinux, RIC, Add SIO, FIOPS, Headphone quality improvement and other misc optimizations.
USB fast charge depends on your computer. In our test conditions, it increased the current for 500ma to 700ma. It shall be noted that the processor clock while overclocking does not stick.
So lets say, you set it to 1708 and it resets back to default, do not fret as it is completely normal. The overclocking is performed by the Qualcomm core and one does not need to set it manually.