They really should be better. Solder should still be ascending in his second year as a starter. Same thing with Wendell, who now has a full season of experience making all the line calls. Mankins is finally a full year-plus removed from ACL surgery so he should be back to normal.
If Vollmer is fully healthy he should play at a Pro Bowl level. My only question is Connolly. Is he a long-term right guard? Will Marcus Cannon move to guard and compete against him? Connolly is the only question mark for me, but at the very least I expect he’ll be solid. Just needs to be consistent.