Fr. Stephanos, O.S.B has a couple of good posts up.
I have a simple suggestion for getting rid of hand-holding during the Our Father. Simply add it as a rubric in the GIRM. You hardly ever see somebody do an actual rubric such as striking their breast during the Confeitor or bowing during part of the Nicene Creed. Put it in the GIRM and people will find a reason why they shouldn’t do it.