Let choose valid name with 'system-tag'

Hi,

I wanted to buy minecraft but when I saw my nickname is taken I resigned.

All my friends recognize me by this nickname (it's even more common used by my family and friend than real name.), so i don't want to play with some maded up s*** over my head. Then I came with idea to you, which exactly cover nowadays modern big community requests. Let everyone take his names, but add some inner system with blizzard 'battle-tag', steam 'steam-id' or even Discord, I'm sure this can convince many other people like me, who don't buy this game without possibility to take his own nickname, and so, many people who already playing MC, will be happy to change their nicnames to their own.

I'll be grateful for reply to adapt or refuse this idea, becouse if it will be introduced I want to buy MC instantly :)!