Ok so I have answered my own question.
As I have said I have always been happy with Librelec as a direct o/s boot on my Mini MX. So first I decided to run Kodi through Android on the new GooBang. Works fine. But in the back of my mind I always had that nagging feeling 'isn't Android just getting in the way, why do I actually need it'. So I took the plunge and taking note of the excellent install instructions (including the 'take note: you may corrupt your device first time round but install again and everything should be ok' which happened to me) in no time I had Libreelec booting directly and Android was gone.
Boot up time is excellent and given this is a 2gb/16gb device it is also noticeably faster operationally than my MiniMX 1gb/8gb.