linear,
to me contact position is of utmost importance. We used to have hitters get into contact position with the bat against a pole or unmovable object and use this as an isometric excercise. It really helped in my estimation because it did two different important things.
1 - It helped strengthen the hands, forearms.
2 - It gave them a real feel for that perfect contact position.
Once a hitter would understand and feel the best contact positions for different locations, it became much easier to work on getting there! And they really wanted to get to that position.
This is not an exception to anyone's ideas, it's justan addition to those ideas.