I think trading for Waters is still a real possibility, but I'm getting the feeling they are going to roll the dice on an injured Guard like Simmons or Bentley.
If it works out, well great...you got a star Guard for (probably) well below cost.
Honestly, if we go the FA route, I'd rather bring in both Simmons and Bentley. If we can somehow manage a trade with KC for Waters, then I think we'll add a Guard in Rounds 3-5 in the draft and just be done with it.
I dont see the Bills upgrading their DT spot this year, I think they're happy with what they have. Cant say I agree, but they havent even whispered about upgrading the interior D-Line all offseason.
Pass Rush help comes in the draft, with Brown, Maybin or Orakpo. There are no veteran FAs who could substantially help in that department unfortunately.