Errrrr... was that aimed at me? Cause if so, I think you have a pretty weird definition of what a meltdown is. If you disagree with something I said, feel free to explain why. If I posted a crazy or silly theory explain why it's crazy or silly. But this seems to be an attempt to dismiss any criticism simply by attacking the person, and that is not ok. Let's try to get this topic off on the right foot ^_^.
I can pretty much pick out the sentence that made Hynad think "meltdown" as: "Then there were those changes that are best described as Kingdom Hearts bullshit."
The "Kingdom Hearts bullshit" line tends to be used as a pretty lazy criticism because there are other possibilities that haven't been explored with this assumption that they're going heavy into the weird time travel/alternative timelines direction like Kingdom Hearts (and is usually followed up with blaming Nomura). It seems like some people have made their conclusions on something that is still highly speculative.