Hi Coert,
We working on kodi 15.2
But regarding android 5, we need AMLOGIC (chipset maker) to fix it for this chipset, as they working on new chipsets for 5.0, i don't think they will do this anytime soon.
Also, we will focus on kodi 15.2 more, its more important atm.
But will check with amlogic what is possible and if they planning anything (it also needs to be stable ofc) so its not only, yes we can do 5.0 on the s805 chipset, but it must be stable