[Yoda]

If there is really no such thing as a true sequenced release where each accumulator reaches its inline condition prior to momentum transfer to the next, why does Homer differentiate between sequenced, overlapped and simultaneous? Shouldn't there just be overlapped and simultaneous release sequences?

The Swinger's Sequenced Release Motions -- Uncock to Level, then Snap Roll (from Turned to Vertical) into Impact -- brings the Cocked and Turned Left Wrist into Release with the Right Hand 'palm up' to the Plane (10-20-E). This produces the Maximum Power application of both the #2 and #3 Accumulators.

In contrast, the Hitter's Motions are Simultaneous -- Uncock to Level with a Simultaneous and Gradual Roll into Impact -- thereby forfeiting the Maximum Power of the Turned Left Wrist (#3 Accumulator / 6-B-3-A). The Hitter still enjoys the definite -- albeit gradual -- Overtaking Action of the #3 Accumulator. The lack of Snap Roll is overcome via the addition of Right Arm Thrust.

Summarizing, Homer Kelley felt the 'Sequenced vs. Simultaneous' differentiation was sufficient. Nevertheless, a total understanding of the Swinger's Sequenced Release includes "Sequenced to Impact (thereby gaining Maximum Transfer/Snap Roll Power); then, Simultaneous (thereby gaining Maximum Velocity/Full Extension Power)."