The bills drafted for need not for value. When you draft for need you overreach on some players...Manuel and Alonso and Goodwin.
C- is an appropriate grade.
Now in three years if anyone of the three happen, Manuel is playing like Cam, and Alonso is the next Urlacher or Goodwin is the next Bobby Hayes, that grade becomes and A+.
But for today and value at the time, the grade of C- is very fair.
Most of us like this draft class, because we like to drink Buddy's Kool-Aid.