Guild Wars 2

The Guardian virtues trait does not properly reduce the cool down of the virtues. Each point in virtues applies a 1% CDR to the skills, however the CDR is not applied all at once and is instead applied separately as multiple different effects.

This means that more points in virtues produces a diminishing returns effect.

For example:
At 0 points in virtues the cool downs of Virtue of Resolve is 60 seconds.
At 20 points in virtues the cool down of Virtue of Resolve is 50 seconds.

However 20 points of virtues is supposed to give 20% cdr, which would put virtue of resolve at a cool down of 48 seconds. Instead, Virtue of resolve is at 50 seconds, which is a total cool down reduction of 16.7%

So in this example, 20 points in virtues gives you a 16.7% cdr instead of a 20% cdr – despite the tooltip for the guardian trait stating that you have +20% recharge rate.

Guardian FAQ#31

Virtues isn’t a straight CD reduction, it’s an increase in “Virtue Recharge Rate”