PLEASE! We need this.
More opportunities to change a Battletag would be nice. When I changed mine awhile back I did not realize that I may never get another opportunity again.
Before making my "free" Battletag change, I thought that the warning also implicated the ability to purchase or be awarded with additional name changes in the near future. Well, it's going on years now.
The message: "You've already changed your Battletag once. You cannot change it further at this time." I see when I hover over the disabled [change] button in my account profile with my mouse cursor also seems to imply that eventually there will be future Battletag changes. But, when?
Not being able to use a name I currently want displayed has discouraged me from playing games in my Battle.net library.
I would be willing to pay a reasonable fee and/or wait a reasonable amount of time limit between name changes. Many other game services allow name changes, paid or otherwise.
BUMP for Battletag changes! Please, Blizzard, make this happen soon!