Just as the topic, what is weight shift to you? What role does it play in the swing?
This depends on each person's definitions of the terms "weight" and "shift". These conversations often break down because people have different views on the terms. In my opinion, the terms themselves are not as important as how they are applied in the instruction, and how the student interprets them. A phrase such as "weight transfers from the rear leg to the front leg" makes me nervous. My fear is a student will interpret that in such a way that they will end up with their weight too far forward (towards the pitcher). I noticed that Eric was careful in stating "against the rear side...against the front side". I consider that more accurate.