do you have the original 80's CD for a comparison?
I haven't listened to the stereo layer off the Blu Ray but there is NO comparison when comparing the 5.1 Blu Ray to the original CD. The surround mix reveals little things you've never heard before, especially the inter-play between Izzy and Slash. The first 30 seconds of Welcome To The Jungle and you know you're in for a treat. It's the same but better and I can't think of an area where maybe the 80's CD trumps the Blu Ray.
I'm not one to chase re-masters, constantly trying to find that one best copy. If this were just a stereo release then certainly, at this price point, the original CD would be good enough (for me).