For some reason my original name was just "unavailable" when it's got no reason to be.
Don't think there should be a ID change feature but it would be nice for a 1 time ID change when you purchase and go through the process to set up your ps4. A option to keep or change your name *one time only* should be added. After that you are stuck with your name.
No & No.
If you want to change your name you can make a new account.
I think name changes should be allowed as well,i dont see why its such a taboo for Sony,and yes should be free to do just like practicaly every other forum and online community is.