Again I think you are taking an ideal and assuming its the norm. On 3rd and 10 no is going to ask any OLB to "set the edge". I almost wish I had never heard the term,"setting the edge" since it is now so over used by a lot of people who really don't know what they are talking about (present company excepted. of course )
BTW - forcing a RB deep and wide is ALSO an accepted result when you "set the edge"
BTW - "setting the edge" requires just not being moved off the LOS, keeping control of blocker, and ideally keeping your outside arm free so you can move down the line to the outside freely
BTW- NONE of the above is applicable when you are rushing the passer, which is why there are several great from the outside pass rushers who AREN'T 6'5 with long arms
No one ever said that Fletcher was a 3 down OLB prospect. It was only opined that because of his quickness, he COULD be an option as the outside pass rusher everyone seems to think is an absolute necessity every draft
Love your comment on the term setting the edge.
It seems to have become the stock answer to why any pass rushing OLB isn't draft in NE.
In reality the reason is that BBs believes are grounded in the belief that if you cant stop the run you cant win, and the philoosphy that he wants players who can do everything the position asks capably over players who have heavy strengths and weaknesses.
BBs most overriding philosophy is that defense is played by a TEAM and the if you cannot trust the guy next you will do his job you are screwed.
This leads to favoring a guy who is capable at everything the position asks but spectacular at none than a guy who is dominant in one way but a liablity in another. It also needs to be noted that BBs defensive scheme focusses on all 11 players together, while others sacrifice some players (and opens weaknesses) to free others.
A guy getting 12 sacks a year in a 1gap 34 where he rushes on virtually every pass play (ie Matthews or Harrison) isnt going to put up those numbers here, not because he can't make the same plays in our system,but because he will have less opportunities to do so, because BB is less likely to sell out a different area of the defense to create them.
One gap defenses have the philosophy that they will create a play during a drive that will kill it, so they accept a high level of risk to get that play.
Two gap defenses have the philosophy that you will have to beat me on a very high number of plays to score on me, so I am not going to do anything to give you an easy big play.
After all of these years it still surprises me that people do not recognize that BB is and has been possibly THE most conservative HC in the NFL, or at least very close to it. Perhaps taking risks in high probability situations is what clouds that.