Your home directory's name is tied directly to your user name (short name), unless you are going to change all of that information (command line, and netinfo work), then messing around with it is not a good idea.
PS... yes, I know I am oversimplifying, and it is possible to change the two independently, but you will break lots of things, and it is better left undone. No reason was given for the change, so I assume that it is simply a whim.