With no one out I am surprised that Michigan did not have the batter take a pitch and have the 1B runner steal 2nd with no outs. If Florida throws to second they may get an out, but if the throw is offline or is into the runner, the 3B run scores standing up. If the runner is safe from that point forward you tell the 3rd base runner to go on any ground ball. Even if they throw the runner out at the plate Michigan would have had runners on 1st and 3rd again, so there is no reason not to go.
With Munro behind the plate, opponents have had less than a 50% success rate in stealing, and she hasn't made an error all year. To me, those kinds of odds affect decisions.