If the Pats aren't sold on Williams or Maye, then they absolutely should trade down as some team drafting fairly high may very well be sold on them. Not go back too far, but a couple of spots and pick up a couple extra 1st, a 2nd, and a 3rd or something like that. You still get a high level player this year, another starter this year (the 2nd rounder), and a high level player next year and the year after with the 1st's. It has to be a top 6ish pick this year though for it to make sense. I'm not sure I'd even do the Bears/Panthers trade in this draft as the Bears, though that might give them the 1st pick so even that was amazing for them.