Name changes I'm all for.
What I am not for is this business about shortening them.
Now, shortening might work, but one of the things I happen to love about Final Fantasy XIV is the fact that by virtue of the forename/surname system, people don't have to bicker over getting particular names. At least, not nearly so much.
It is so, so wonderful being able to have the name I want to have. Do you realise how hard it is to secure the name Hana in most MMO's? Beside Forra she's one of my most important characters and it's horrid having to faff about with her name.
And that aside, there's something really, really nice about being in a world where there's a chance of meeting someone with a similar name to your own.
So yes. Yes to name changes, but for goodness' sake please protect the advantages of the forename/surname system in allowing it. Shortening sounds worryingly like it might impinge on that.