A little back of the napkin figuring....
In 2010, when he was on the roster the whole year and Mauer's primary backup, Butera got 155 AB in 170 plate appearances. Let's assume he gets about 150 plate appearances, though that seems high. Furthermore, let's ONLY take a look at offensive impact, not counting any defensive value.
According to Baseball-reference.com, Butera has created 20 runs in 407 plate appearances or .048 runs per plate appearance.
Meanwhile, Hughes has created 31 runs in 335 plate appearances, or .092 per plate appearances.
The difference between those guys is .044 runs per plate appearance.
Over 150 plate appearance thats....6.6 runs difference. That's 2/3 of a win or less than 1% of the runs the Twins will produce this year.
It is also well within reach of what Butera could add just by gunning down a few baserunners.
I spent most of the offseason on the podcast asking that the Twins get some reasonable alternatives to Butera. But from a practical standpoint, they have. This kvetching seems like a knee-jerk reaction, a bad habit that we've developed, a Pavlovian defense mechanism.