Ok so, this what I understand of it:
1. The more you hold the meter, then closer blue lines shrink, thus receiving less forgiveness during the putt (if you miss).
2. This is from what WGTNiv wrote a long time ago:
Balance works with the putter's precision rating and represents consistency throughout the different distance increments of your putter. The higher the balance rating, the more you can rely on the ball consistently going the distance you've struck your putt, especially so on longer putts. Balance also works with forgiveness in a very similar manner to help reign in the effect of off-center hits, also making them react more consistently on longer putts.
Moral of the story, as I understand it: when you swing, drag and let go and hit. Holding meter works against you
-wgticon