'All is consciousness' and 'all is emptiness' are equally inaccurate ways of saying the same thing. Consciousness is as a something of the general kind called a 'field', like electro-magnetic or quantum only somehow more subtle, but this at best refers to a kind of sheath, a most refined prakriti, missing the point that there is, as it were nothing behind it, non-conscious ground. While 'emptiness' is too easily confused with the void of annihilation, or else yet another rarefied ether. Better, perhaps, if you must think, to think of pure act.