I think what really matters is that Lamb is a lot better than Randall Cobb who had 83 targets last year. If Lamb plays the slot and gets the slot corner covering him, he's going to be open . . . a lot. So if that target number goes up to around 100 (which isn't that much more than Cobb had) then that's going to probably put all three of them around the same number. The three main Dallas wide receivers last year combined for 303 targets, and last year they probably threw the ball a lot more than they wanted to. Yes that doesn't take into account the 82 targets Witten had, but tight end targets tend to stick with tight ends, not move to wide receivers. So if there are 303 targets up for grabs, then you figure out how to divide that to make any of them finish in the WR1 conversation next year, because I don't see it happening without an injury to one of them. I think just like last year there will be games that Cooper blows up, games that Gallup blows up, and games that Lamb blows up, but you'll have no idea which one it will be each game and each one will be just as likely to have 2 catches for 24 yards as 10 catches for 180 yards and 3 touchdowns, which makes it a nightmare from a fantasy perspective.
Your post makes a lot sense. Not sure I buy CeeDee performing better then Cobb did last year. Not that he doesn't have the talent, just that even really good rookie WRs take time to fit into a offense and with two dependable vets there is no need to accelerate or force feed CeeDee. Think it will be a more gradual process. However I do buy the idea that the WR who blows up will be hard to call week to week in the Cowboys offense.