Just got it working. There was something crazy going on with my filesystem after a failed attempt at moving away from f2fs.. Very cool to have this, this is perfect to introduce Xposed to and customize exactly how you want.
I really hope we see more improved releases of this. Whatsapp doesn't seem to want to send or receive its authentication sms. Haven't tried phone call or normal sms but I suspect this is some issue? Wifi works fine though. Its interesting to see the Aosp keyboard doesn't support gestures because ever since the last few 4.4.2 releases up until now, gestures haven't worked for me on any custom rom, although apparently I'm the only one with this problem.
It would also be really nice to have the original boot animation looking as it should but that is a small issues. Here are a couple of very similar KitKat boot animations I found ages ago but cannot remember where so unfortunately I cannot give credit. But they are not mine. One has a black background and the one with the 'R' at the end of the name has a red background, which will need to be renamed if you use it of course.
Phone: Samsung Galaxy S4 Mini International 3G (i9190)
Firmware: Carbon KitKat 4.4.4