On the question of moving the fences, it still looks to me like someone would have to do a detailed study of where the "close but no cigar" balls landed.
In 2010, the Twins hit 44.8% of the HR hit at TF
In 2011, the Twins hit 36.5% of the HR hit at TF
Thus far in 2012, the Twins have hit 43. 5% of the HR hit at TF
UNLESS a disproportionate number of the "close" balls are being hit by the Twins, why would you want to move in the fences? As long as the Twins are hitting less than 50% of the HR at TF, moving in the fences would only seem to favor opponents.
Now, if a detailed study of this question proved that moving in the fences would actually move the Twins over 50% because more Twins-hit balls were falling close but not going out, that would make a major difference.
But until the Twins hit more than 50% of the HR at TF, it would seem to me that it benefits the Twins if TF suppresses HR.