Edit: Here's another, also including nil2fs: http://forum.xda-developers.com/show....php?t=1890129
Basically, Samsung developed a filesystem allegedly geared towards the nuances of NAND flash. With the recent buzz surrounding the Moto E and the X, F2FS seems to be getting thrown around a lot as partial explanation towards those devices' snappiness despite "lower-end" hardware.
Everyone here knows that the Evita has some pretty bad issues with its eMMC, and we've tried a bunch of different things to try to mitigate its poor quality. Maybe this is worth a shot?