Agree 100%. Jamba can inform you in multiple ways when someone has broken 'follow'

A GUI of your teammates names with a green icon if following, red if broken

A chat message from the teammate who has broken follow

A big red boomie message in the middle of your screen if someone has broken follow (in case the other 2 aren't enough )

I didn't use it 3 boxing but for 5 toons, I'd say it's a must-have.

It has a TON of options and you should read the set-up tutorial. Like anything involving boxing, an hour of time up-front getting familiar with how it works will save you multiple hours in the end.