Who would you guys say is your bigger off season addition, Cooks or DJ?

Our podcast is starting a series on key/interesting off season acquisitions for each team and we're kind of split on the Texans. Cooks is supposedly going to be Hopkins' replacement, but they are hardly the same type of receiver. DJ was a player with so much potential but with Duke Johnson having a similar versatility (in terms of helping out in the passing game) does David Johnson have a place on the roster? I'm interested to know what you guys think.