Uhh, aside from the most important aspect being talent, scheming is entirely based on trying to disguise what you're intending to do. Nobody is telling 11 guys to go out there and wing it. Scheme can help cover up for talent deficiencies but it works even better when there are good players executing it. Not always. Seattle has a pretty basic defense. They just cover well and rush the QB. There's not a ton of deception. And some teams disguise much better than others.