IMO out of the three you gave, I would be most concerned about B.
A) I like our linebacker group, not completely sure about depth, but in the transfer portal age, it's hard to tell until during the season.
B) I think this comes down to coaching. Can Elko handle the defense better this year and have them better prepared. I like our DBs, hoping they can make a jump.
C) Not completely sure how I feel about our Dline. I'm maybe concerned about his unit more than the other two, however it is not because we lost guys to the NFL as those guys didn't do a huge amount here. I'm not expecting the unit to regress.
Outside of that, my biggest concern is the passing game. I was high on our wide receivers before losing Hudson and Thomas. Now I am not sure how I feel. Would like to see a more explosive offense that relies on big pass plays, and would love to see a breakout wide receiver (the kind that you see on sports center, Ryan Williams type).
"I am going fishing" - John 21:3