In my present build I have it, plus +20% boon time on Acrobatics.
I seem to be getting 33 seconds of vigor on steal which is incredible. 3 more seconds is 20% of 15. 3 + 30 = 33. Unless I missed something else that is giving me more benefit here or there was a change that didn’t make it to tooltip.
Any clarification? Should the trait be that powerful?
I am the super thief