Wait, really? You don't think anything has changed since Garchomp was banned?
It's generally acknowledged that Sand Veil was what got Garchomp banned in the first place; it was very good without it, but the ability itself just gave it too many opportunities to set up a Swords Dance and demolish your team.
These days, Garchomp getting a Swords Dance doesn't mean your entire team is dead, because a lot of Pokemon can outspeed it and hit it for heavy damage. Scarf Genesect runs rampant, and it demolishes Garchomp with Ice Beam (or it can just smack it with U-Turn if Garchomp is weakened enough). Keldeo can use Icy Wind to take Garchomp out, and Hydro Pump will do a number on it as well. Choice Band Terrakion almost always OHKOs Garchomp after Stealth Rock. Lati@s outspeed destroy Garchomp with STAB Dragon-type moves. Starmie can KO Garchomp, as always, and even stuff like HP Ice Jolteon has a renewed presence with the dominance of Rain in this metagame. A lot of this stuff existed before, which is why a lot of people didn't think Garchomp was broken before without Sand Veil. But Garchomp's checks have become a lot more prominent. The huge abundance of Scarf Genesect makes a big difference too, since Genesect downright counters any Garchomp that lacks a Fire move...any Garchomp without a Fire move can't run Sub+SD, which was the set that was considered broken before because of Sand Veil's annoying 20% chance to get off a free Swords Dance (and a 4% chance to have up both a Swords Dance and a Sub, which spells death for basically any team lacking Skarmory or, I guess, Bronzong).
So what's changed? Sand is a lot less dominant, Rain is a lot more so, there are a number of new checks to Garchomp's Sub+SD set, and a number of Pokemon who checked Garchomp well become have become more prominent with the prevalence of Rain. Non-Sub/SD Garchomp has become a lot less impressive, since it has to compete with Latios for a team spot, and Latios is generally more reliable at dishing out damage outside of sandstorm. But the problem that got Garchomp banned before still exists; even though every set besides Sub+SD is less threatening than it used to be, the Sub+SD set still has a decent chance of getting off a boost that the opponent can do nothing about, and that will nearly guarantee the opponent will lose at least two Pokemon. Given that people have been bothered by Gliscor's ability to do the same thing, and that Garchomp's other sets are a lot less dominant than they used to be, there's plenty of reason to discuss allowing Garchomp back into the metagame, particularly is Sand Veil is banned.
Also, don't underestimate Gliscor's power. Acrobatics + EQ is actually pretty brutal at +2, especially given that a Flight Gem boosted Acrobatics has a pretty solid shot at destroying (non-Steel) physical walls after Stealth Rock damage.
It's generally acknowledged that Sand Veil was what got Garchomp banned in the first place; it was very good without it, but the ability itself just gave it too many opportunities to set up a Swords Dance and demolish your team.
These days, Garchomp getting a Swords Dance doesn't mean your entire team is dead, because a lot of Pokemon can outspeed it and hit it for heavy damage. Scarf Genesect runs rampant, and it demolishes Garchomp with Ice Beam (or it can just smack it with U-Turn if Garchomp is weakened enough). Keldeo can use Icy Wind to take Garchomp out, and Hydro Pump will do a number on it as well. Choice Band Terrakion almost always OHKOs Garchomp after Stealth Rock. Lati@s outspeed destroy Garchomp with STAB Dragon-type moves. Starmie can KO Garchomp, as always, and even stuff like HP Ice Jolteon has a renewed presence with the dominance of Rain in this metagame. A lot of this stuff existed before, which is why a lot of people didn't think Garchomp was broken before without Sand Veil. But Garchomp's checks have become a lot more prominent. The huge abundance of Scarf Genesect makes a big difference too, since Genesect downright counters any Garchomp that lacks a Fire move...any Garchomp without a Fire move can't run Sub+SD, which was the set that was considered broken before because of Sand Veil's annoying 20% chance to get off a free Swords Dance (and a 4% chance to have up both a Swords Dance and a Sub, which spells death for basically any team lacking Skarmory or, I guess, Bronzong).
So what's changed? Sand is a lot less dominant, Rain is a lot more so, there are a number of new checks to Garchomp's Sub+SD set, and a number of Pokemon who checked Garchomp well become have become more prominent with the prevalence of Rain. Non-Sub/SD Garchomp has become a lot less impressive, since it has to compete with Latios for a team spot, and Latios is generally more reliable at dishing out damage outside of sandstorm. But the problem that got Garchomp banned before still exists; even though every set besides Sub+SD is less threatening than it used to be, the Sub+SD set still has a decent chance of getting off a boost that the opponent can do nothing about, and that will nearly guarantee the opponent will lose at least two Pokemon. Given that people have been bothered by Gliscor's ability to do the same thing, and that Garchomp's other sets are a lot less dominant than they used to be, there's plenty of reason to discuss allowing Garchomp back into the metagame, particularly is Sand Veil is banned.
Also, don't underestimate Gliscor's power. Acrobatics + EQ is actually pretty brutal at +2, especially given that a Flight Gem boosted Acrobatics has a pretty solid shot at destroying (non-Steel) physical walls after Stealth Rock damage.








