Hi, if you want more space on KitKat ROMS you can try using Link2SD or Mount2SD linked with and EXT partition on your SD card.
Besides, there must be tweaks or scripts related to this in the DEV section.
Hope I helped,
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?