Gorebyss easily remains as one of the most dangerous and very best set-up sweepers in the tier. While it doesn't have as much usage as it did back in the day, the threat of this monster still heavily restricts the essence of team building, likewise for Ludicolo, simply because it's extremely difficult to actually "counter". In terms of setting up, it honestly isn't even unlikely of doing so because of its really nice base Defense and the number of Pokemon that it can potentially force out. It's great Defense and ability to run Substitute allows it to take priority much better than other sweepers while still being durable enough to be able to tramp through, or even sweep through the opposing team. Its coverage, though generally offset compared to the options that it normally would like to be running, is quite underrated, to be fair. It can be utilized in a way that allows it to severly damage or KO it's current biggest check, Ludicolo, with Signal Beam or some odd Hidden Power, without having to rely on Life Orb if that's not your item of choice.
Speaking of Gorebyss in terms of positioning it on specific play styles of teams, such as Weather or Hyper Offense, that's another thing that makes it function so well, as they are excellent ways to aid to its ability to easily plow through standard teams, and even if it doesn't manage to sweep an entire team, it will plow through them to the point where its offensive teammates can easily run rampant enough to seal the game.
Regarding Weather, Gorebyss doesn't even need to set-up a Shell Smash in the Rain in order to wreck through teams. Part of the reason that it wasn't banned was because it was too slow before it actually sets up a Shell Smash and therefore wasn't very much of a threat until it does set up. However, considering its notably higher SpA than Ludicolo, this disproves that theory, as it gains a +2 Speed Boost and boosts in Surf/Hydro Pump. With that being said, if it does manage to setup in the rain, chances are that it's likely good game, as the normal methods of revenge killing it are severely limited. Either way, Gorebyss' rain-boosted STAB moves will severely dent anything that doesn't resist it. It can use other various options to support the team under the rain as well, but generally less useful outside of that.
In the Hyper Offense category, Gorebyss shares excellent synergy with a large portion of common setup sweepers and Dual Screen users, and as such, they will definitely support each other in their roles. When it gets an opportunity to get screens up, its sweeping potential reaches a whole new level. Under Reflect, it will manage to be able to setup a Shell Smash on just about any Physical Attacker, and under Light Screen, it can setup on many Special Attackers, and you can even prevent Scarf Electric types from revenge killing you.
Gorebyss is an immensely powerful threat that should definitely be prepared for, and thus will remain a dangerous asset towards the metagame.