You're still not answering the question. Damn it, try to stay on track, here:
How is Cloud's personality derailed, as was originally stated?
It really isn't, in my opinion. He was stated to be they way he was in Crisis Core in FFVII. They said that he was an aspiring kid that wanted to be in SOLDIER. But he was kind of timid and mentally weak. That's why he didn't get in and was later made a regular Shin-ra grunt. CC doesn't interfere with the image of Cloud that FFVII provides us with at all. I guess Ether is just trying to say that there was no real reason to show that AGAIN in Crisis Core and that the many FFVII spin-offs are just being used to cash in money on the heavily milked game that is FFVII.
I hope this sounds in no way offensive.