Not necessarily an apples to apples comparison, but...
After the Twins won the WS in 1991, they dumped Al Newman for Donnie Hill and gave Pedro Munoz a full-time spot allowing Dan Gladden to leave in free agency.
Donnie Hill was a train wreck and didn't even last half a season. Munoz, statistically, was fine but the Twins sorely missed Gladden in the clubhouse. Ditto for Newman.
Easy to look at the back of the baseball card and say this guy needs to go, but baseball is a 6 month marathon and the mental part is sometimes just as important as the on-field production.
Understood that the Twins' financial situation may preclude them from keeping Vazquez beyond this year, but I wouldn't necessarily be thrilled to see him go.