My current Gibsons are Alex Lifeson and R9 Les Pauls.
I've had numerous Les Paul Standards, Traditional Pro, and Studio models that I liked... but didn't ultimately love.
All of these guitars needed a professional setup (and I had the original nut replaced with bone).
With higher-end Gibson models, I think you're getting the best wood/hardware/electronics... and much more attention to fine details. My AL and R9 needed zero setup or adjustments.
If I now sit down and play a Standard, it sounds/feels a bit "pedestrian".
Not cheap... or bad... just not the WOW feeling
To be fair, this is how I feel when comparing most guitars to those two Les Pauls.
I really admire PRS guitars because the attention to details. The instruments are almost works of art.
Got my first PRS several years back... and it was "gig ready" out of the box.
Had to slightly adjust the intonation (after changing to my preferred strings)... and that was it.
Played great, sounded great, easy to maintain, and just fun to play...
As nice as that PRS was (is), the R9 just has a little something extra.
I always said I'd never sell that PRS. Had that guitar longer than any other.
It just wasn't being played as much (or taken out to gigs), and it was too expensive to just sit on the wall.
I don't think all is lost for Gibson.
I think John is right in that they need to "get back to basics".
Build the guitars you're known for... and build them to the highest quality standards.