I think people are assuming we are losing the entire OL, but may not be the case. While Big Dan, Olson and Schleuter are gone, I think older Ruschmeyer is likely back. Schmitz and Andries are gonna come down to draft feedback, but would not be shocked to see one or both back.
I also think Mo is the first domino to fall and we will see more announcements next week. I heavily believe CAB will be back (similar situation to Mo as far as NFL stock being sidetracked this year by injuries). And in what will likely be the most divisive topic this offseason, Morgan may very well return.