Time will tell, but I just don't think Sanders has the wheels anymore to get that reliably deep. John Brown is 3 years younger. Unlike QBs, father time slows down RBs and WRs. I think Sanders will fall into the wiley veteran with good hands role. I expect him to lull the CB2 to sleep and double move him, but I don't think he is the just run deep guy anymore.
Edit: I'll also add, I think Diggs has come out and said he wants to run deeper routes too. Could be E takes some of the middle routes DIggs was running last year.