I would also like to ask about MB's foot pivot.
You have stated before that you use a midfoot/ball pivot, yet all three of these throws use a heel pivot.
Have you changed your pivot or were you doing this on purpose? It looks like you have a longer final step, possibly due to more leg push, this may be the reason for the heel pivot? Which yields more distance or consistency for you?
I also am thinking about the release point, and related to the other thread about release points, it does seem that the elbow does not extend as far forward as commonly thought to be ideal here at DGR. Ie. the elbow punch/forward technique, it seems it is good practice to start from the right pec and work from the hit back in order to learn to get as far forward as you can. However, it seems that the disc really does release from the middle/left pec at the hit according to videos I have seen(including this one). Although we do commonly see throws from the left and behind a RHBH golfer, this may be the cause for the illusion. An above slow motion video of MB would be an interesting view.