the fact that the Steelers got Holmes on a 1st round pick and p/u another receiver in the draft should tell everyone that the Steelers think they need more answers at WR, than just Morgan, Ward and Wilson.
I think if anything, this is Wilson's make or break year with the Steelers. He's likely to get a lot more playing time this year. but right now, i think he's looked on more as another possesion type receiver. I don't think anyone thinks he has the size or speed to be a burner, but he does run good routes and at times has good hands. He had a great run in the playoffs, and will likely get more chances this upcoming season. But they are really high on Holmes....as the guy that can get separation and beat a defense.
Wilson does present some of the same attributes as Randel El, as he was a qb out of HS, and was used some at UT as a versatile guy. From that standpoint, they may in fact be looking at him to carry on in that same mold as Randel El.