So I understand that Darmanitan-Galar is more than likely the next in line for a tiering decision, which yeah, it makes sense all things considered. But there's something I am curious about should it come to this after the meta's been given some time to settle: What about suspect testing Gorilla Tactics instead?
Gorilla Tactics is the obvious root of all of the issues with Darmanitan, the built-in Choice Band boost is what allows it to shred through teams like butter. At the same time, it's Darm's signature ability, meaning nothing else would be compromised in the event of the ability being banned unlike, say, Speed Boost Blaziken. There's also precedent for banning broken abilities over the Pokemon themselves, the most notable examples being Arena Trap, Shadow Tag and Power Construct.
Without Gorilla Tactics, Darmanitan-Galar is relegated to Zen Mode, a potentially still powerful but ultimately much less consistent option that would no longer have the benefit of getting sweeps off of switches driven by people expecting the Choice Scarf/Band Gorilla Tactics set. The drop in immediate power would also be noticeable, letting things defensively check/counter it much easier.
Considering there is precedent for banning broken abilities over the Pokemon unlike with signature moves, I see no reason to throw the baby out with the bathwater via a flat ban on Darmanitan assuming it is still found to be busted once the meta settles.