Like I said, there is work to be done. I think Ish and Lewis are good overall WRs who we can depend on.
Everyone else has work to do. Phillips and Estime are faster and more athletic than the others but as you say, neither was a receiver last year. They have a lot of work to do. Someone like Avant or Custis could easily secure a starting spot with a good spring. A guy no one is talking about that I could easily see emerge as one of our best WRs is Tyrone Perkins. Womack has a high ceiling with his speed, hands and raw athletic ability. If the staff elects to keep Strickland at WR, he might have the highest ceiling of any of them.
The new staff and new offense give all the WRs a chance to start fresh. I think most of these guys will get some PT regardless. Hopefully a couple of them will emerge as solid players.