I listened to the Star Wars 70mm 6-track recreation for the first time over the weekend (on Harmy's de-specialized AVCHD). I don't have a high-end separates 5.1 system, just a "home cinema in a box" type thing.
My review in one word - flawless.
I couldn't hear any joins where the '93 mix had been patched with bits of the '77 mix, and it's nice that the added Alderaan debris and detention block glass smashing sounds have gone. I think you've got the overall dynamics and bass volume spot on.
I will always have a soft spot for the mono mix; it's the one I grew up with and in terms of content is the most complete sounding. But for the overall sonic experience this is the mix I'd listen to again and again.