I would have to question the sanity in the Falcons front office if they draft yet another DT. In the past few drafts we've drafted Bab's, Lavalais, and Shropshire (DE/DT tweener). Unless Atlanta is thinking of doing something with Coleman I don't see why we would want yet another DT.
You just described why we need a NT.
We have a 5th rounder and 7th rounder at NT, and took a 2nd rounder at UT.
Lavalais and Shrop are great as 2nd stringers with potential, who rotate in, but neither is a dominant force NT, requiring double teams...and that is precisely what is required in this defense.
NT is a bigger need than CB or RB in this draft and FA period. I'd rather sign a FA, because they're pretty cheap.
If you saw the entire right side of our line collapse game in and game out, you know that it's not just RDE, but also NT that is an issue in our primary weakness: run defense.