I'm pretty comfortable with the idea of Lee as the Twins regular 3ed baseman for the next few seasons. He's looked very good defensively. And as oothers have noted, he's improving steadily as a hitter.
First of all, yes. But a sac bunt there is very defensible strategy. Scoring from third doesn't require a hit, and a single run ends the game.
Second of all...Ross? Some power??
It's not cut and dried. The unofficial official rule of thumb is, a play not made requiring "ordinary effort" is an error.
Another unofficial official rule of thumb is, not touched= no error.
These are the guidelines MLB gives to official scorers.