We have Hardy who is a solid Pass Rusher. I think your #1 pick has to be able to contribute and start at some point in the 1st year. 2nd year at the latest. I didn't think that OO could be that 1st year pass rusher that I felt like we needed at the time. Now that we have Hardy as the pass rusher, I think the gamble to develop OO as a pass rusher is acceptable. I do think that at worst, he can be a Strong Side DE and play the run very well. If it works out and you can have an OO as a Weakside Pass Rusher and move Hardy to the Strong Side, the possibilities are very encouraging. Of course, this would mean that we would have to resign Hardy but I think that we will do that unless I am totally wrong about that guy.
Hardy can of course play either DE spot & a bit of 3-tech...but the Cowboys have already said he'll primarily play/start at RDE. And then there's Lawrence...whom they gave up 2 picks for & who began to show up in the playoffs.
OO makes sense to me because Hardy is on a 1-yr. deal & Mincey is in the final year of his contract. Not to mention injuries, which they had plenty of in the front 7 last season. If unable to re-sign Hardy, that could still give them a young & potentially solid DE combo moving forward...and both could possibly play either side. Adding OO (actually with signing Hardy & having Lawrence healthy)...could also allow Mincey to slide inside next to Crawford in the nickel/on 3rd downs. Over his career, Mincey has been a fairly solid interior rusher. With the injuries to Spencer, Lawrence, Gardner, etc. lat year, Mincey was basically forced to stay at DE in the nickel.
Even without the draft, Dallas could have a similar line to the one Marinelli had with the Bears in 2012.
2012 Bears - LDE: Idonije/Wootton (7 sacks ea.), Melton (6 sacks), Paea (2.5 sacks), Peppers (11.5 sacks)
2015 Boys - LDE: Lawrence/Mincey, Crawford, Brent?, Hardy
Potential nickel/3rd down DL - LDE: Lawrence, DT: Mincey, DT Crawford, RDE: Hardy
OO could bolster & add potential versatility to the above...and essentially add some longer-term insurance if unable to retain Hardy. Even if they re-signed Hardy but chose to not attempt to re-sign the older Mincey...they'd still have a trio of Hardy, OO, and Lawrence. Be interesting to see how things play out. Also curious to see how long any potential suspension for Hardy might be.