I haven't followed the entire thread. So I'm going to keep most of my opinions about catcher stance to myself, but I would like to stab at the item I've quote-grabbed above: 3 differences that I have always focused on between my 2 catchers (1 softball and 1 baseball) is the trajectory of the pitch, the distance to second, and the lead off factor. Because of those 3 items alone, my 2 catcher styles are slightly different.
Aw, c'mon. You can give me more than that! You've identified some differences in the game, which I agree are valid differences. How/why/what does a catcher need to do differently in softball to make themselves more effective or more efficient because of the differences? I'm not challenging you so I can disprove your opinion. I want to understand why my opinion might be wrong.
How/why does the pitch trajectory in softball require a different receiving stance?
How/why does the shorter base-path of softball require a different stance or throwing mechanic?
What happens with a lead-off before the pitch in baseball that mandates something different than the shorter base-path of softball?