Question [Q] Can i transfer system storage to data storage?

Hi evereybody, i have nexus 5 16gb and i wonder this: i use cm 11 rom on my n5 and i edit ( erasing some unnecessary system apps for example talkback.apk etc ) before flashing the zip. And after flashing when i checked system storage on root explorer, i see there is some free space ( 600mb). can i use that free space for installing app or for storage?

Sorry for my english.