The Virtue of Courage passive effect should have a visible cooldown timers on the skill or somewhere on the UI.
The aegis that it provides is a very useful buff. However, it is very hard to keep track of when the aegis will appear again and due to the fast combat system with a lot of incoming damage, even when the aegis recharges you can miss it easily.
This change is necessary in order to give us(Guardians) a better knowledge as to when to actually activate that Virtue.
Also, I don’t know much about other classes, but if there are any other classes that suffer from the same issue, I believe they should have the same system in place,