I don't even know which game you are referencing but looking through plays with Covington at 1tech, maybe it's this one.
Covington is not the problem on this play.
- The backside DT (Collins) let the RT get inside.
- That kept the RG from having to block or help block Collins.
- The RG was free to get out and block Jaylon.
- It was 2nd and 7. I think the Cowboys were going to stunt if it had been a pass play.
- The stunt would be DT Collins moving outside and DE Bennett coming around behind Collins to the inside.
With my suggested change, if they used it on this play, the LB #48 Thomas would be outside and up near the line.
- The RDE would play the B gap, instead of the C gap.
Watch this play and envision if #48 was outside the RDE and up near the line.
Envision the RDE's initial alignment being head-up or shaded just slightly outside the LT and him playing the B gap.
Based on specific players, I would actually have LVE and Thomas swapped putting LVE up on the line outside the RDE.