Oh, you can pretty much take it to the bank that some free agents will be brought in. I see this for 2 main reasons:
1) There aren't too many "key guys" remaining with Jones and Collins being traded and Butler most likely getting a first round tender as a RFA in the spring.
2) Losing 1st and 2nd rounders is probably beginning to catch up to them in terms of the deflategate punishment (1st), the decision to move on from Easley (1st), Collins (2nd), Jones (1st), and the piss poor rookie campaign from Cyrus Jones (2nd). Add in some head scratchers from guys like Wilson (2nd) and Richards (2nd) and you'll see some holes in Belichick's recent drafting style. For a guy who bases all of his decisions and has seen so much success from cheap, rookie draft picks, this could prove to be a bigger obstacle than we initially thought.
With a decent amount of cap space, some obvious holes on that side of the ball and not many players even worth keeping outside of Hightower and Harmon, free agency would seem to be a decent possibility.