I'm confident I'm not the first person to bring this up. I had a great GT before changing it back to my old one after a *fun night* that I don't even remember. I left it alone for a while and on the VERY SAME DAY I decided to change it back, the new GT system was implemented only allowing 12 characters. My GT that i wanted back is 13. ONE NUMBER OFF. It was a unique name and an inside joke with my group of friends I have been playing with on Xbox for almost a decade. It SUCKS that I can't get it back. I understand that with the new system it can be whatever you want with the # junk but it isn't the same without the last letter. It was unique and a call to a good time with my friends. Again, I'm aware this will most likely get lost in the pile, not be addressed, or unfulfilled but what can i say, I'm an optimist.
As another point, limiting it to 12 characters SEVERELY stifles your community's creativity. I've seen incredible GT's upwards of 15 characters. funny, clever, simple, intricate, etc. essentially what I'm saying is; the new system blows. Increasing the character limit won't kill you.
Thanks :)