There has been a lot of talk surrounding Joe Barksdale being both an option at Right Guard and at back-up Swing Tackle. This is due to both the length and the price of his recent deal. Neither should be the case for two reasons.
The first is the obvious choice: D.J. Fluker should be flipped inside to Right Guard. The argument is always "it's either DJ Fluker or Joe Barksdale at Right Tackle" and that is the wrong way to view the Chargers' Offensive Line. It's not "either or"; it should be both.