I don't see any differentiation between our top 4 receivers in terms of who is the starter and who's the backup (Hurns,dorsett,coley,waters). they all rotate non stop and morris spreads it around very well in my opinion so they all get their chances. Even if you don't start you can play more than the starter depending upon performance
The only consistent things I've seen is dorsett is usually our go route guy on play action, herb Is usually over the middle, and hurns had been clutch on screens and 3rd downs this year