Default [Q] FSF2: why is this not more implemented?

We all know about the advantages of the FSF2 filesystem from the Moto X (and the anandtech review) and we also know about the disadvantages. I am just wondering why we are not seeing a bigger push for FSF2 from the custom roms. I mean that PA and CM aren't doing it I can kinda understand. There vision is or at least was to stay as close to stock as possible. But why is Slimrom not heavily promoting and using FSF2? I mean this rom is focussed on great performance, and this is just what FSF2 delivers!

Yes, if you are irresponsible you can brick your device and yes it can take a while before the memort has mounted, but if you remove these disadvantages. You can get a 30 to 300 percent improvement in performance...