We need to be assuming Sandoval can't play third. He's refused to play first base and pouted when forced to. He is not a good enough hitter to DH. How the hell is he "a big part of our future?"
I'd rather turn the DH position over to Blake Swihart than Pablo Sandoval right now. Or hell, turn it over to Leon and let Swihart and Vazquez battle for the catcher's job again. Or turn it over to Ramirez if Sam Travis looks ready to rock next Spring. There is just no actual spot for Sandoval anymore, thanks largely to the positive news from the development of our rookies.
As it is we have Moncada, Swihart and possibly Travis to figure out how to shoehorn into an already crowded lineup, our bench looks superb with Holt, Young, Hernandez (once Holt moves on), Shaw and Vazquez forming the core of a bench that should last us awhile with no need to make changes, and other talents like Mauricio Dubon who will also need chances to show their stuff.
There are much better investments of roster space on this team, right now, than Sandoval, and more good candidates than we have spots even without him.
I hope DD has the stones to stick to his guns like he did this year and say screw the money, let's build the best roster we can. That roster is absurdly unlikely to include Pablo "Goodyear" Sandoval.