I can see why you would have Tunsil higher than Jack, but I think the defense needs an injection of talent a lot more than the OL. Also drafting a LT means having to dump Monroe which I dislike from a resource allocation standpoint. Yes, Tunsil would be a better player, but that's a lot of cap and draft resources tied up in one position.
I don't see any red flags from Treadwell unless you think he is something that he isn't. He's never been an explosive WR, but he brings the overall package that profiles as a #1 WR. He has great size, elite body control, strong at the catch point, great hands, strong route-running, ability to pick up YAC. Worst case you're looking at Alshon Jeffery imo.
Vernon Butler had a poor combine and the tape isn't good enough to place him higher, I think he's a day 2 talent.