There are now so many bodies at DT I can't see that as being a need any more. They started last year with three and there are six credible options in play. Wilfork and even Kelly could get PUP'd but they'll still have bodies, and it's good odds they'd find late round or UDFA fliers if they needed them.
Food for thought: if the Pats do what many people here have been wanting them to do, which is move Cannon to RG and Connolly to C, then the need is not IOL, but OT.
With Solder / Mankins / Connolly / Cannon / Vollmer, you have currently signed top backups of Kline, Barker, and Cave, all interior guys supposedly with upside. It's been awhile since we've seen an OT make it off the practice squad (Ashworth?) so if the Pats have an open swing OT spot it makes sense to draft him, probably 3rd - 4th.
Personally I am far more confident in Connolly's ability to play center again than Cannon's ability to play guard, but as Cannon is probably our most talented reserve lineman and has paid his dues I can understand him getting pencilled in there. It's either that or they take the next Mankins.
I would be surprised if the Pats were looking to draft their opening day starter at any position on the OL after the 1st round.
I think we're looking at a two TE draft. That is the one smoking hole on the roster.
1.TE
2.DE
3.TE
4.LB + OT
6. - 7. whatever floats