I'm playing a L35 Fire/Energy Blaster, and defiance is frankly not noticeable.
In a very flawed situation (ghost ship got stuck in Talos) I was able to use it by dropping myself repeatedly from a great height - given the very low levels of damage being dealt by ghost ship passengers, defiance then seemed useful - the increase in damage was apparent (although, I like the idea of some positive indication that it's active)
in actual mission play/street hunting however... afraid not. It starts coming into play far too low, and ramps up too fast. In about 75% of the cases where I die, I am one-shotted by a volley of fire in response to an AoE like fireball.
Can I just add at this point, that I dislike the reduced accuracy of Bosses and Lts enormously - it robs the game of fun and any sense of urgency when I have (for example) a Freakshow tank standing on front of me... previously, I knew that one good swipe would possibly kill, certainly hurt me. Now I can stand toe-toe with a hugely armed bad guy with impunity as he swipes away in mid air at me. It removes any sense of danger, and therefore any sense of urgency to fight him.
I would *much* rather see them have their accuracy restored, but do a little less damage - in other words, the blaster defenses that we have been screaming for for months.
The ultimate solution to the accuracy problem would be to introduce a range element - someone standing fifty yards away should be less accurate than someone standing toe-to-toe.
