Might is pretty much about being strong.
Not entirely. Lifting, breaking, and wrestling also require a fair bit of technique. So Might also includes the effective application of strength.
That's why you can have Mediocre Might and Mythic Strength.
Is it? The warden sword is a counterspell at a fixed value, no? You touch the warden sword to a spell and it dissipates, not you cleave through it, using your weapons skill and it shatters.
The Warden Sword is a counterspell at a fixed value because that's how enchanted items work. Not because that's how it's portrayed in the novels.
The way it's portrayed in the novels could be "use Weapons", a fixed value counterspell, a focus that boosts counterspell control/power, an Aspect...it's flexible, because the novels are notably lacking in rules text.
Not saying it's a bad power. Just saying, Not at my table, cause I can't see how it makes sense in the Dresden Universe. Makes plenty of sense in other worlds
The Dresden universe has all sorts of crazy nonsense thrown together with no obvious rhyme or reason. Fans try to make it all seem consistent and clear, but honestly cyborg aliens could show up in the next book and they'd fit just fine if Jim presented them with his usual style.
IIRC in Ghost Story Bob says that Spiderman exists. And Sir Stuart says that, much as the White Council loves to classify stuff, the world does not accommodate classification well.
Really, "doesn't fit the Dresdenverse" is a pretty weird thing to say.