I think we'll look for a smaller receiver to replace Roberts given we've got 2 guys who can win deep outside. Someone like Robert Herron or Bruce Ellington. Then again Arians seemed to use Fitz in the slot quite a bit, and has often said he prefers a 2nd TE to a 3rd WR so perhaps we'll just stick with Brown/Golden/Byrd behind Fitz/Floyd. Really deep WR class though, 5 to about 20 is a crapshoot of guys who could go as early as the late 1st to perhaps slip to the 4th round. Deepest position in the mid round area IMO.
As for Carr to the Titans, unless the Vikes take a QB in the first I can't see him slipping past their 2nd and they pick in front of the Titans. Zimmer comes from Cincinatti where a 2nd round QB helped turned them around and Carr is a perfect fit for Norv's Air Coryell. I also don't think Whiz wants to stir the pot with an early round QB, probably take another late round flyer with arm talent and a good frame like he did with us(and the Chargers last year). Perhaps Dustin Vaughan, Jeff Matthews, or Keith Wenning.