Okay the only thing I really feel like addressing here is the issue of 1.3% vs 0.6% rDPS. It's entirely pointless to discuss anything but nearly optimal situations. You're also failing to consider the fact that most people's cooldowns, burst phases and raid damage cooldowns likely line-up at the same time. Due to this 1.3% is an accurate to low estimate because if you take in the positives and negatives it goes up and down. I checked your post on the page you linked and you entirely ignored potential positives only including the negatives that would instead hurt MCH rather than anything that might help it.

As for anything else you mentioned I may not have read. No, I probably didn't I'm inherently lazy and this whole topic is rather absurd.