It's been what, 11 years?
A lot of time has flowed since the last time Salamence was used in a DPP OU game. The metagame has seen a lot of change and innovation since it was banned. And quite frankly, I think it hasn't been kind to it at all.
First of all: Latias was reintroduced in OU with great success. It's been a positive influence on a lot of playstyles; and people haven't had to change too much to adapt to the strong and fast Draco Meteor that was so feared.
A lot of time has flowed since the last time Salamence was used in a DPP OU game. The metagame has seen a lot of change and innovation since it was banned. And quite frankly, I think it hasn't been kind to it at all.
First of all: Latias was reintroduced in OU with great success. It's been a positive influence on a lot of playstyles; and people haven't had to change too much to adapt to the strong and fast Draco Meteor that was so feared.
- The Latias re-introduction being a resounding success proves that it's feasible to re-test anything we want, as centralizing as it can be. I don't believe anyone would think Salamence is more centralizing than Latias.
- Latias is a natural enemy of Salamence that was removed from the tier before Salamence was banned. It's faster, kills any set in one shot, and isn't SR weak like Salamence is. Choice Scarf sets can also revenge kill Salamence's feared DD sets.
- I believe that Salamence would also have a positive influence on the metagame. There are a lot of threats that offer an equivalent level of power to Salamence in the current metagame. A threat such as Breloom would have one more enemy to deal with and perhaps be more tame. Jirachi wouldn't serve as a one-stop answer to any Dragon type threat anymore because it doesn't fare too well against Salamence. Salamence can fit on a lot of different playstyles; HO loves the DD sets; balanced teams can use Mixed, Specs, and even CB sets; and I'm sure Stall teams would love to run FatMence once in a while.
- A lot of Salamence's set rely on Life Orb to be as strong as it needs to be to KO most things. As we all know, relying on Life Orb in a metagame where permanent sand and Stealth Rock are up from about turn 5 onwards in basically every game is far from ideal. Add to that Salamence's Stealth Rock weakness, and you've got a short-lived yet dangerous threat.
- We've all faced MixNite; most balanced teams are technically "weak" to MixNite because it can KO everything in 2 hits, but it usually falls short after a KO because of all the chip damage it's taking. Do we really have any reason to believe MixMence would behave any differently? I don't think so. Yes it's better because of the Speed, but it's also missing Superpower which is important to KO Clefable, Tyranitar, and other such things.
- DD sets can seem scary and will probably require more adaptation than the Mixed sets, but quite frankly are they that different from DDNite? Dragonite is pretty good but it's no world beater. Salamence has a few tricks Dragonite can't do, like Speed tying the base 100 scarfers and outspeeding Scarf Rotom, but it's still as reliant on Outrage as Dragonite is. Plus, since it's lacking Fire Punch, it has to pack Fire Blast which will do considerably less damage against things like Bronzong.
- Salamence still has a lot of enemies running around the meta; like Starmie, Swampert, Latias, Gengar, Bronzong, etc. that will all be ready to deal with it if it's dropped back in. Old foes such as Scizor might also regain popularity given they're only a few things away from relevance.