A need, but not a need for a complete re-build. Lawson and Hughes will be fine, IMO. Lawson hasn’t been good as a pass rusher, but he has been solid against the run. Give him time...certainly not time for the “bust” conversation.
Their greatest need on the d-line, IMO, is a run stuffing NT/DT (1 tech/3 tech) such as Vita Vea or Reginald McKenzie.