At this point, they've put so much play time into Mason & Jackson that they should plan to start them again next year and just make sure they are coached better. They can retain Kline as a reserve "swing guard" of sorts, and Stork can play guard in a pinch too... Wonder if they try to get Andrews involved at guard next year like they did with Wendell, even if only for emergency purposes.
Solder, Vollmer, Waddle, Cannon - if they're retained and stay mostly healthy, that's probably a good enough group of tackles. I am assuming Waddle is average based on the few snaps we saw, though.