Hmmm...so much to unpack here
I do tend to agree Dorsey and Allen need to find a way to spread the ball around and trust in your 4th and 5th option to make plays from time to time. Yet if you look at the very best WRs of which Diggs is one of them, they get high volumes of targets.
My gut tells me this offense will be best if Diggs is around 110 receptions and Davis, Knox and Kincaid each get 6-8 TD receptions.