A few thoughts.
1) They have scheduled Vea for a private visit, so they're considering him.
2) They've repeatedly stated that they'd be interested in a 1-tech if he "displayed 3-tech traits". Vea has plenty of athleticism, Washington even had subpackages where he played OLB.
3) I don't know where this idea that he's just a space-eating 1-tech is coming from; maybe it's because he only had 3.5 sacks? Point is, I've watched a lot of his tape and he creates plenty of pressure. More importantly, he gets double-teamed and still creates pressure. It's like having your cake and eating it.
4) On P.J. Hall, I've watched two of his games. Funny enough, I liked him more as a 4-3 RE against some college called "Incarnate World". Watching him as a 3T against North Dakota State has me worried though; he did nothing rushing the passer.