I'm not worried about it. Heard has been good since getting healthy and Karic has a 6th year of eligibility remaining if he chooses to use it, so the left side of the line should be fine.
At RG we should have Umarov back, who was projected to see a lot of playing time this year before getting hurt. At RT we'll see a competitive between three giants: Larry Johnson III, Bennett Warren and Jeremias Heard. Jeremias is the most athletically gifted OL on the roster. At center I've got no reason to think Lang and Satterwhite aren't viable options. It projects like:
LT: L. Heard
LG: Karic
C: Lang/Satterwhite
RG: Umarov
RT: LGIII/Warren/J. Heard
If you get a portal guy that's a bonus. If Sanders comes in ready to play that's a bonus. If Reddick, Bussell, Anderson, Duncan, Perry, Grant, or Ginther decide they want to make a career out of playing football that's a bonus.
That being said, none of Elarbee's HS recruits have been good - so I think it's fair to doubt guys like Lang, Satterwhite, Umarov, Warren, etc.