After Bars went down, ND played with 3 new starters...it was a transitional year for the OL. 4 starters return next year. OL is the one position where guys consistently get better each year in the program.
Bottom line is offense should be better, defense will probably be worse. Hopefully the team as a whole is just as good...the good news is the defense will still be able to pressure the QB with Okwara and Kareem back.