That's certainly a better argument than AkronAlumnus was attempting to make.
You still listed 2 players who played a combined 7 games last season. Willis will be returning from a broken foot, which he had to get a secondary surgery on after re-injury. That type of injury with a secondary surgery can take up to 3 years for a player to return to 100% per the national institute of health.
Sumlin's injury I'm not sure what it was, but it was severe enough that he missed the entire season. Depending on what the injury was it's hard to project what, if any, impact it might have on his game for next season.
I would say the injury concerns surrounding both players still leaves questions on how effective both players will be. I will concede there is more certainty there than with the other 2 prior mentioned players that have yet to play.