So I am in game now, and I've noticed this before, but I didn't realize just how bad this is, because in the past I could fix it manually by relogging.
After applying Elemental Sharpening Stones (crit stones) my crit goes up 4% normally (2% for each stone) but I haven't had quite the amount of performance edge that I should have even while spending a lot of gold on these.
Every weaponswap to a weapon without a crit stone, and then back to the weapon lowers my natural crit by 2%, which is required for a warrior to tank, and also for weapon swapping for execute.
So after leaving a raid, looking at my crit in my tooltip, with my gear on it is sitting at 15.55%
And taking all of my gear off, my crit as a level 60 goes to 0.00%
Please take a look at this because I've been doing some under par dps lately in raids and I couldn't explain why until I realized my crit % was going down during the raid!
This is with gear on
http://imgur.com/yxoq9D8
This is naked, with 80 agil but 0% crit
http://imgur.com/fxVi7q9