There will be a large cohort that would dish it regardless because it won’t be as good as Appetite or Illusions etc a lot of their fanbase are stuck in the early 90s mainly because of their age demographic and lack of output from the band which has kept them in a sort of time warp, now you could say the same thing about a lot of other bands from their era but bands like ACDC and Metallica have continued to release new albums and work the songs into the setlist which keeps it fresh for them and the fans ,hopefully GnR are thinking that way aswell after releasing 4 good songs and playing them live which had a positive impact on their gigs
And here's the rub:
It could be as good as AFD or Illusions.
And people will still dis it, or say it's not, because it's just not going to have the same kind of impact. The material could be groundbreakingly good....and it will be consumed by a much smaller audience than AFD was back in the 80s and Illusions was in the 90s. The media isn't going to tell them it's good, so they will yell that it's not...because it didn't sell what AFD or UYI 1/2 did. They will guage quality by metrics that just aren't realistic anymore, instead of realistic ones based on cultural habits RIGHT NOW. Watch and see.
I have bad news for those people: Rock is not king anymore. It's just not the cultural monster it was back then. Someone else said it's about time, and having a limited amount of time to have impact. I disagree with that, specifically (because we've seen generational talents pivot with the times and stay relevant), but I agree that functionally it can work that way, because musical tastes change, and it can be VERY hard for acts to change their voice to match "current hotness". And tastes tend to move slowly...and then stick there for a long time.
We are in the age of the pop princesses, squarely. Probably right in the middle of it. And we have been in it for about a decade or so. People aren't showing signs of moving off it, yet. We have awhile more of Tay Tay, Beyonce, Sabrina, et al dominating the charts and the headlines (and ticket sales). And GnR isn't going to penetrate that bubble, no matter what they release, no matter how good it is, no matter how much we all want it to.
Maybe by 2030 we'll start to move a bit to something else. Until then, rock acts are not going to get the same exposure they did. And we have to sort of adjust our expectations and metrics for success to match where we are, not where we were, or where we wish we were.