Keep in mind that Sableye is going to be even more of a pain in the ass to deal with if Huntail is banned. Unlike a lot of other walls, Sableye is immune to boom. It also packs Recover, lacks weaknesses, has moves like Calm Mind, Taunt, Counter to fuck over things that would normally check it, etc. What that means is: why does it even matter that you can "take advantage of it"? If you can't kill it with anything resembling reliability, what does it matter? So what if you get 3 layers of Spikes up on it? If you can't kill it, it doesn't fucking matter. First you have to force the damn thing out. And there's only a limited selection of mons in this tier that can accomplish even that. Remember that Sableye is this annoying check-all mon that you shove in front of your opponent's attacker that walls shit with ease. It's not easy to force out that damn thing. Agreeing with Bughouse on this. Sableye should be banned.
Sableye remaining unbanned probably won't make things strategic. All you'll get is a huge upsurge of stall, since Sableye is so easy to use. Sableyes, Vigoroths everywhere. I guess Pikachu and Plusle too.
Also keep in mind that this is ADV NU. All of the good boosting mons have been stolen by the higher tiers. So you're left with things like Hitmonchan and Chimecho, who Sableye is EVed to counter. So what you're left with is what, Vigoroth?
Being spikes-bait and Mawile-bait is irrelevant. Any stall team worth a damn has a bulky Spinner and Wish Flareon. The latter is already annoying enough on its own and shitstomps Mawile, the former you won't be able to keep Spikes down because Haunter is not a good spinblocker because fraility. Only spinblocker really is Sableye, which means we're just going to see that damn thing everywhere.
I am neutral on Huntail. Despite its power, I've never been swept by one, though I can see why people want it banned. Again, I reiterate that Huntail being banned will make Sableye even more of an annoying shit.
Triangles If there's ever a time that both of us unretire, I'd like for us to play ADV NU if/when my interest in it comes back up.