They actually NEED WR's first.
That's been the case since the Ravens got here. This past season, Joe had arguably the best receiving talent he's ever had, yet the offense failed to take advantage. That's either the play structure, play calling, route-running, lack of protection, or Joe not feeling comfortable with his primary downfield read and defaulting to a dump-off. I think it was a combination of all of the above.
Perriman, Aiken and Smith...???