I am sorry but I have a really hard time with what you have posted here. Shaft droop is a result of very simple physics. It is a fairly well understood and measured phenomenon. Shaft droop is caused because the cog of the clubhead is off center from the shaft. As far as I can tell it is un-avoidable and has nothing to do with shaft plane. The faster one swings the more the offset of the weight bends the shaft. Stiffer shafts with stiffer tips will have less shaft droop which could have contributed to Moe possibly having less shaft droop then some players.
If you can explain why being on plane with the spine will stop this form happening I would really like to understand