I've been playing a lot of SM UU lately and given how much I've come to enjoy this tier I figured that I'll throw in my 2 cents
Regarding Scizor:
Scizor is a very versatile Pokemon. He has access to Technician Bullet Punch, U-turn, Knock Off, Swords Dance, Pursuit, Roost and good coverage moves. His typing leaves him with one weakness only and his stats are nothing to complain about either. Therefore I too believe that Scizor is the "best" Pokemon in the current metagame.
But there must always be a top dog and Scizor is the single least intrusive
"best
" Pokemon in any tier that I have ever laid my hand on. There are clear-cut, extremely viable Pokemon that cover a multitude of Scizor's best sets and they can be found on completely different playstyles, doing entirely different things:
Hazard setter such as Mega-Aggron, Mega-Steelix, Hippowdon
Set-up sweeper in the form of Infernape, Cobalion, Moltres, Doublade
Removal namely Rotom-Heat, Empoleon and Tentacruel
Other defensive/offensive pivots like Mega-Manectric and Amoonguss
Unaware walls (both of them)
Moreover Scizor can specifically be targeted by just about any Pokemon due to its 4x weakness to fire and can also fall victim to the last standing trapper Magneton who can even go one step ahead and have a teammate bring it in safely via eject button. I get that offense can struggle against Scizor but offense is supposed to struggle against strong priority, that is moreso a drawback of the archetype as a whole and its not like they have no tools at their disposal either.
To sum up, I think that Scizor is very desirable and healthy for the UU metagame, it adds some of the most interesting dynamics such as this one
(Diancie/Moltres serve as placeholder for Rock- and Fire-types)
but at the end of the day I would be totally fine if Scizor were to be suspected, hell I even prefer a suspect test since it is the communities decision which direction we want to go, however, I will be voting in favor of Scizor staying unbanned and I hope I could make some people in favor of the ban think about the other side of the argument.
PS: Ban Terrakion