Strength: My example was an extreme case, but it turns out to be the same thing: you describe SD as a thin fop, and the thug to be big and brutish. I'm not seeing Batman and Daredevil, I'm seeing Captain America and The Thing: one may be a capable fighter, but will not be able to stop a blow from someone who's obviously much stronger than him with his bare hands.
The problem comes from your presentation. You present him as pretty damned strong (going from building to building, jumping down on the car anf flipping, catching a fist) until he gets his ass whipped. Present him differently, and you won't have to overcome the "superheroes are super-strong" predisposition most of us have.