No it doesn't. We have precedent for banning stuff like this before (i.e. Moody, Swagger). Because of this, we have established that banning uncompetitive things from Ubers is okay. If, therefore, it is proven that Gengarite/STAG are uncompetitive as well (which they are), then we can freely ban them without ruining the integrity of the tier. The real question is whether or not you think Gengarite/Shadow Tag is uncompetitive enough to warrant a ban.
And your precedents are getting more lax as we go on. If you've noticed, the other ones had clear reasons why they were uncompetitive, while Shadow Tag is a lot more dubious, if we're going by your definitions.
The argument that "it's fair because I can do it too" doesn't help because at the end, when the Shadow Tag Pokemon have done their job, the person with the better set of rocks is still going to win. Then it becomes not a question of "can I outplay the other guy" but "can I trap his counter to my sweeper before he does mine?".
Explain why this is uncompetitive? This sounds more like an overcentralisation argument than an uncompetitive one if you ask me. You've still outplayed the other guy if you managed to execute your game plan of trapping counters before your opponent does. It's the same thing as something like "instead of can I outplay the other guy, can I use my Garchomp counter-counter to remove his Garchomp counter before he does mine" (you should recognise where that came from, and it's not Ubers).
You are wrongly assuming that Shadow Tag is one of many things that makes team matchup a problem. It is a single thing that affects everything in ways nothing else does. Team matchup is one of the three variables that decide matches, the others being skill and luck, just because of the kind of game Pokemon is and true balance is more or less impossible to achieve. Player skill is expressed by making smart switches and reacting to your opponent's switches and moves. Shadow Tag removes that, hence skill is gone from the equation. That means you're left with team matchup and luck...do we have a competitive game anymore? At the end of the day, Shadow Tag does the same thing Moody and Swagger did: it removes skill from the equation of deciding Pokemon battles. The methodology is different, but the end result is the same.
I'm not assuming this, it's straight out of pro-ban arguments. Might I remind you:
The reality is that when two tag players play eachother, the one with the better team matchup will win consistently because it takes zero skill to apply your shadow tag strategy before the other guy when it already matchup in it's favor starting the game off with that player in the favorable position to do so.
This isn't something I made up you know. And like I just mentioned above, pulling off your Shadow Tag strategy before your opponent still means you outplayed your opponent, which implies that there's skill involved. See what I mean by "fair" and "unfair"? The other clauses had the fact that even if you outplayed your opponent, you can still lose. Shadow Tag, on the other hand, still requires you to outplay your opponent. This is also not to mention the fact that Shadow Tag isn't even a 100% success rate thing either. Gengar can't run Taunt/Shadow Ball/HP Fire/Focus Miss/Destiny Bond/Perish Song all the same set, so there will be things you can't trap and things you can. There's also the question of getting Gengar in safely (I've seen shit like Dark Pulse Grassceus from Orch), Mega Evolving, or even predicting between Taunt/Destiny Bond (eg will Ekiller set up SD again while you DBond, or will it kill you with Shadow Claw as you Taunt it). Even then, removing that counter isn't the be all and end all in bring out your GeoXern or Ekiller or whatever to sweep. You opponent can still stop that sweeper from setting up, killing it outright while you're doing so, setting up their own sweep while you're trying to find switch-ins, and the whole issue of secondary checks. You're hopelessly oversimplifying the whole thing if you think Shadow Tag is the one silver bullet that would fix anything.
If Shadow Tag is the thing making things worse, is it not therefore the problem? Yes, team matchup is inherent in Pokemon because that's the nature of the game. But when you have Shadow Tag displacing its effects such that it overtakes skill as the primary method of deciding games, that is when it becomes a problem. And it is a problem, otherwise we wouldn't be testing it.
I think the fact Melee Mewtwo went 5-0 in SPL against arguably superior players by relying on STAG alone is enough of a "direct impact".
4-1, last game was a joke game where I brought Bunnelby and almost won but manaphy's Xern haxed my Xern when Wobbuffet gave it an otherwise free setup to win. /salt ~MM2
A couple of things wrong with the MM2 example:
- Shadow Tag didn't decide anything in that battle. The loss came as a "direct impact" from hax, if anything.
- We've been using Wobbuffet to provide opportunities for deadly sweepers since 2007. It wasn't an issue. Why is it a problem now? Yes, we have deadlier Shadow Tag users now, but nothing has fundamentally changed. What has changed is the mentality that banning things in Ubers is okay, and we've moved the goalposts further and further apart for shit that can be banned. Let's not let that trend continue.