TW gave you a consistent amount of catches and touchdowns, about 45 catches, 700 yards and 4 touchdowns. That's not bad, we hope Gallup can do better, but with Cooper, Witten and Zeke catching passes, I suspect there's not going to be that many throws coming his way.
Zeke averaged 26.88 rushes/pass targets last year, with the team having an average of about 65 plays a game, that means it was Zeke touching the ball 40% of the time. Cooper had an average of about 8 targets a game, this year it will likely be more, so if he gets 10 per game, that means just he and Zeke will get 55% of the touches, leaving only about 29 a game for everybody else, like Witten, Jarwin, Cobb, Austin and of course Dak with some rushes, too.
Wouldn't be surprised if Gallup ended up with about the same stats as TW....