I'm increasingly joining the bandwagon on this. These moves are always about the "IF"s. IF he doesn't get into trouble, IF he gets along with coach, IF he is motivated -- he'd be awesome for us. These high profile moves - if they work, they can make your franchise. If they fail, it takes 3-5 years to rebuild, salvage the salary cap, and get a new coach.
With DJax, we solve a major issue. I think you're more likely to get a very good safety, RT, MLB in the second round than a WR.
Also in a strange way -- if our offense finally starts scoring again, it can make opposing offenses one dimensional / pass-first. That could help our defense, & allow our D-line just rush the QB. Not sure how our secondary would respond. So ironically, by helping our offense -- there's a chance DJax could indirectly make our defense more effective.