NFL free agency is mostly excitement for a short amount of time followed by the realization that most players hit the market for a reason. Whether that reason is because their skills have declined, they don't fit a system, injury concerns or some kind of attitude/culture fit issue with their previous teams, rarely are free agents huge hits on their new teams.
Recently we saw a number of players, including LB Jerome Baker Jr., who signed big deals in the last couple of years, either as free agents or with their own teams, be released.