This is where you have to be personally patient and instead of seeing him this year for your entertainment, you convince yourself you'd much rather he be around an extra year in his prime.
Familia was traded for A's 17th best prospect and a NR prospect. I know Soria has an extra year, but it's not like it's a small amount he's owed. I would say most trade proposals on here for Soria are 2-3 times more than what they will get.
Over last 30 days, he has the third worst fWAR in all of baseball (only Hosmer and VMart worse). On the season, he's one of the 5 worst "high leverage" hitters in baseball. For the season, he's a negative fWAR player now.