| is probably the hardest schemes to implement. It's also the one that's the most in demand with a limited supply of coaches that can actually implement it.
(A big reason Sean McVay keeps losing coordinators.)
As for what other teams do in general, I really don't see much of a difference between the Giants and an average team like the Raiders or Steelers.
The only thing is that those teams score more often than not when in the redzone while the Giants just don't.
And as for the defense, all of them throughout the NFL are getting demolished. It's not just the Giants. Even look at the Bucs against the Cowboys, which has a top-3 defense, for reference. Heck, the Eagles sucked last night and were a couple plays away from hanging 30 on them.
The NFL, like the NBA, has evolved into scoring as much as possible with tempo. You have to be aggressive almost all of the time because the opportunity presented by success has significantly outweighed the loss factor of field position.
When offenses can score at will, field position becomes much less of a factor.