If Lawrence works out I think he's Byron Young who I think we liked few years ago, blew up the Combine, went early 3rd and is now one of the better edge rushers in the league. He's not going to start as a rookie because he's a bit raw around the edges, particularly against the run, but his juice off the edge should play immediately if you save him mostly for passing situations.
Gary and Ezeiruaku were locked in starters to begin with, but Lawrence should be valuable right away as a DPR who then hopefully grows into the starting role opposite Ezeiruaku by year 2 or 3.
I think you have to feel really good about our edge rush group at this point: Gary is a rock steady vet starter, Ezeiruaku is ascending and should give you about 6-8 sacks next year, Lawrence brings explosiveness off the edge, and our 4th guy (Houston) is easily capable of giving you 4-5 sacks. And who knows, maybe dumbass Williams can turn himself into something useful?