Every year, there are several quality players available in veteran free agency and the NFL Draft. Just because they are good prospects, that doesn't mean they can play in a certain team's offensive or defensive schemes. In today's NFL, it's imperative that a team find players who are capable of playing within their scheme.
There used to be the thought process that a club should just draft good players and find a way for them to fit within the scheme. That is false thinking and sets a club up for losing. I had the opportunity to work with Hall of Fame coach Bill Parcells for seven years in New York with the Giants, and Bill had a saying;" If you start drafting exceptions, you're going to have a team full of exceptions… and then you'll lose.