Hey, does anyone know why the game streak version doesn't have a rename button? It doesn't make sense to me. 

I was looking for information on this subject but found nothing and it seems interesting in my opinion 

The Microsoft/ Xbox store contains a Profanity filter and apparently that is why the renaming feature has been disabled for that version. You will have to check with them whether there is some way to turn it off, the developers simply complied with the requirements of that store.

There were quite a few threads at launch about this as well, the subject has been discussed in detail. :)