DWare is the much better player, no question on that. But I don't see that as the question at hand here.
The only way I do see it as similar is when DWare left we had noone to replace him. If Dez leaves we don't have anyone to replace him either. We can always hope some rookie WR can play, but most of the time they need time to develop. We would have TWill, yuck, and not much else.
If you want to get rid of someone, have someone in the wings to take his spot, something we didn't do with DWare and now we are trying to repeat history with Dez.