Agility and armor are [b]very[/b] ineffective, this video shows an extensive test that proves such.
http://youtu.be/PgoDqz1ZnvA
The effects of agility and armor need to be increased.
Edit 1: Please watch the video, because many have commented arguing with nothing more than anecdotal evidence. While the video provides facts backed up by the mathematical calculations.
Edit 2: someone in the comments below mentioned a fantastic idea. What if armor pieces gave you agility and armor points? Possibly even recovery points.
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Agility should have been a perk on armor pieces rather than guns.