Somehow I missed reading this until now. You beat me to it with what you said about had to say about McKinney. I was really happy when he was signed, and I still am. Performance as a college Safety doesn't often translate to NFL quality. Thus, picking up a proven FA like McKinney is excellent. Yeah, matching him up with one or probably more very athletic Safetys and developing them would be good too. I'd draft one of those 3rd - 6th round and take a flyer on that cheetah you're talking about as a FA. I'd also draft a smart plodder Safety in the 4th - 7th as well as getting one of those as a FA. That plus whatever leftovers we have should be just fine.
I don't give a shit about the color of a Corner hahahaha. I'm not even sure what color DeJean is. I think I'd be ok with drafting him in the first round, although I kinda doubt that happens. In addition to Jaire, the Packers seem to be ready to making a commitment to Stokes as well as paying Nixon plus Valentine is a keeper and maybe Ballentine too. It's not a position of great need.
As meh as O Line is to me, we do need a couple more bodies there. This Dillard and several other low round and FA pickups should do the job. I say again, do NOT draft O Line 1st or 2nd round.