Three Wheels On My Wagon

I am intrigued by ITDs critical tables. I have never seen them but it came up recently in a discussion on on armour by the piece that there are different critical tables by location and only three locations; limbs, head and body.

For me the only piece of RM that has to be retained is the critical; everything else has to earn its place at the table. If it is more effort that it adds to the game I am inclined to cut or replace it.