[kia345]

The problem is we now have to find out who Graal677246 is and who Graal556432 is, and somehow remember them with those numbers rather than a unique and individual name.

Say you have three members in a kingdom with the same rank. One earns a promotion. We have to take an extra step and remember his/her number to be sure we're doing the right person

It would be far simpler with an account name.

I don't really see any problem with the old account names