I know Fletcher called the defense. My point was, if Crowell moves to the middle, pending the draft, it will either be him or a rookie presumably calling the D. Not usually a good idea.
As for the holes in no particular order:
Corner, MLB, Fullback, DT, OLB (because I don't trust Ellison and even if I do, we need depth), WR (a Tall one for goal line because Price is done, Reed isn't the answer and Parrish is only good for the slot), and I would also look at another Corner because good teams protect leads in the 4th quarter with good nickel and dime defense when teams are trying to come back on them through the air.
Then again I guess we don't need that because at this point we won't be protecting many leads.