Heres a quote from someone at blu-ray.com.
‘While I’d obviously love for the mono to return in an inevitable re-release, at the very least I’d settle for the soundtrack that was used theatrically last Summer. I kept expecting the newer, high-pitched gunshots when Arnold kills the first of the Sarah Connors, but instead it was the original gunshots. I was confused. As far as I can tell, it was some sort of hybrid between the original soundtrack and the remix. Definitely the lesser of two evils in that it’s better than the straight-up remix we’ve got on the Blu-ray.’
If this is true, perhaps we’re stepping in the right direction???