If you have several Jami IDs in your Jami app, each one without a registered username and each one has the same display name it will be hard to determine each account. Adding a way to label each account in Jami for you to see when changing accounts will be user friendly way to go about this.
Yes I like that to.
Also I like it to rename usernames on my device from people in my contact list.
So that there is no 2 times Bob in the list.