Gorebyss is still a strong threat. Perhaps one factor is that a lot of teams recently try to hit as hard as possible, giving Gorebyss little window to set up. Scarf Electrics are still common (not as common as back then, but still) enough, and maybe people feel setting up Gorebyss is too hard and does not yield too much result. Also, you see a lot of priority everywhere. You'll see at least one in a good offensive team. If you want to guard yourself against that, you need White Herb. And those White Herb variants lack the sheer destructive power of Life Orb.
And Ludicolo dropping didn't help, either. Now it has to decide between getting walled by either Ludicolo or other Water-types (like Samurott, etc). And because NU is such a large tier with so many viable mons, once you drop off the limelight nobody seems to care because there's like 30 other sets you wanted to try.
Gorebyss is still strong as hell, though. I urge you to use it more and promote its usage!