Honestly, I feel a slowtwins ban is deserved.
This may be an unpopular opinion but let me explain,
The Combination of Future Sight + Teleport + Regenerator makes the slowtwins amazing picks to compliment breakers to have no trouble getting them in and causing huge impact. Teleport is guaranteed momentum and has 0 drawbacks. Heavy duty boots further enhances the difficulty in breaking these. Although there are checks, a good predicted teleport or a swap into a check for that given pokemon can lead to amazing outcomes and they force so many swaps, and also check many Pokemon defensively while having all this utility. They have reliable recovery and scald, which is an amazing move to shut down physical attackers with a burn.
Future sight is an amazing move, a 120bp stab move with 0 drawbacks that acts on the same turn as an attacker after a teleport is far too overpowering in my opinion, pokemon that would usually check mons defensively no longer can beca use of this absurd move, it either forces out resists which can be taken advantage of or just leaves a mon to die, high is very hard to punish given the amount it checks and how easy it is to get up.
Teleport is, too good. A negative priority momentum move with 0 drawbacks acts perfectly with its set. Being able to capitalise so easily on the future sight is again, far too overpowering. Allowing things to be able to break checks while having an amazing pokemon with it is incredibly unhealthy. It is impossible to punish and leaves the player risk free. Being able to teleport with such a fat mon and bring in another mon to abuse the future sight the leave the opponent to find a swap in that’s probably non-existent.
Regenerator is, the best defensive ability. 33% Health regen on a fat mon with a risk free momentum move? This makes the slowtwins incredibly hard to break added to all the utility I discussed above. Not even just on slowtwins, regenerator mons have proven to be extremely difficult to wear down, pair this with future sight, teleport, boots, reliable recovery and scald makes these a beast of a defensive mon that just allows offensive mons to go wild.
Feel free to agree or disagree but I honestly feel they are very unhealthy for the tier.