The guys from the Crew are building their roms specifically for JB kernels without selinux. Earlier I assumed that the kernel must be updated to KK to work with omni rom properly, but I was wrong due to the reason mentioned above.
I tried Lollipop test build on 7800 and it works with ART fully functional, but obviously has some problems.
You're right about devs - there are none.
Yep, as I say. 5.0 in RK3188 is possible, but using the same kernel as JB, the same Rockchip libraries (mali, gralloc, hwcomposer, etc), so for me this is not true Lollipop, so to speak, except the UI, because kernel is clearly outdated (it's a bit outdated even in kitkat) Unless rockchip update their SDK to 5.0 in RK3188, 5.0 is just a ROM with JB or kitkat stuff. And at the moment rockchip SDK is 5.0 only for rk3288 (and still beta), for rk3188 is just 4.4.4