Quinn's defense is kind of janky in that when he came in he basically flipped Bradley's defense (source SI's Championship Edition)
Bryant went from Strongside (playing over the TE?) to the Weakside (over tackle).
As did, Wright who was allowed to play more in space and use his length and instincts to be a play-maker.
As a result, Clemons and Irvin both were asked to play the Strongside.
For Clemons, it meant he had less pass-rush opportunities and more responsibilities in run defense, setting the edge.
Same for Irvin, which is why Quinn said the LEO and SLB were basically the same.
Then Earl and Kam switched high-and-low responsibilities which allowed Kam to play up to the line.
The Defense in itself was basically a 3-5-3... and it worked because it basically took away Sherman's Side of The Field and forced QBs to almost always throw across their bodies.
What does this have to do with KJ Wright and Malcolm Smith?
I just think Quinn, when Wright isn't hobbled, just trusts Wrights superb instincts, and playing WILL allows him to play in space rather than take on blocks. And we've seen what KJ Wright can do, he's pretty solid whether if its at Sam, Mike, or Will.
But I also think the switch was made last year to reduce Wright's wear and tear. Even though he came into the League at 245, he has a lot of length at 6'4. He's also not particularally the strongest or the most athletic especially in our stable of LBers. To me he's one of the most cerebral players on the team, so I can see why he has more value in playing in space being in the best position to track the Ball Carrier.
I think Quinn like Smith at SAM, even though he's naturally suited for WILL is because Smith is stout, he came into the league at 5'11, 225 but I think last year he played 235. So at the point of attack Smith is just a lot stouter. He's also the strongest of the LBers which helps him engage and fend off blockers a little bit better without getting fatigued. But above anything else his elite athleticism and 4.4 speed allows him to do a variety of things like rush the passer, set the strongside edge, drop into coverage, protect the flats, while being able to play sideline to sideline.
Which is why they probably have Irvin starting over Malcolm because even though Bruce is/was incredibly raw and lacks/lacked experience compared to Smith, he's basically the 6'3, 255 pound version of Smith as an athlete.