Ashworth shouldn't be playing on the left side any. He's got good footwork, but he lacks the lateral agility to be a full time left tackle. Ashworth is a right tackle all the way, but he isn't your typical right tackle. He's not the big, powerful, road grading blocker that you typically see at right tackle. He's more of a wall off, position blocker that understands blocking angles and uses them to his advantage. He doesn't have a lot of ability, but he is one of those guys that gets the most out of what he has.
IMO, he's an OK guy to sign for the short term, but in the long run, a guy like Anthony Alabi or possibly a draft pick like Winston Justice will beat him out.