Sorry but gorebyss is still a pretty good sweeper and it has for less competition for the role of special water sweeper then huntail has for physical water sweeper.For the record I think Huntail is better than Gorebyss now. You're never using Gorebyss to sweep because it's still too slow even after a boost, and you can actually attempt to sweep with Huntail because Sucker Punch. In terms of SmashPass, they both do that job identically well because the only difference in their stat spreads is with their Attack and Special Attack. Huntail is also a slightly better Coil user because of Water Veil and higher Attack.
Physical water sweepers: Huntail, Gatr, Samurott, Barbarcle, Carcosta, Kabutops
Special water sweepers: Gorebyss, Simipour, Ludicolo?
I can see the reasons why huntail would be better but please don't undersell Gibby :}
Gibby = Dentri's Gorebyss