"derpy wasn't change because of anything"
"derpy was changed because"

Are you fucking kidding me?

But, to address what you've simplified the argument to above:

1. I preferred Derpy's original voice, but I can see the logic behind making her sound more female. I just wish the voice acting had been done better. As it is, it sounds rushed.
2. Minor legal thing. Very unlikely, as explained in the Reddit article.
3. Her eyes are still crossed, but not nearly as much, and not so much that a first time viewer would notice. She's still technically derped, but far less so.

I know that this whole thing will ultimately blow over, but I just hope that everyone tries to remain calm throughout it.