Is Toughness a completely useless stat? I don't see any benefits for taking Toughness over any other stat. If i take a gear with 1000 Toughens, for example, i don't see for how much i get dmg reduced. 10%? 17%? 22%? Please, Anet, could you add the exact numbers? Why do i have to do a math by myself? We get exact numbers with ALL other stats, with Toughness being an exception for no reason.
Lets take a look at Guardian Sword. With base 1000 Power the sword Auto attack deals 158 dmg (in PvP). With adding 1000 Power the dmg rises up to 315. The Dmg is doubled! We get exact number, not just random numbers.
Lets look at Vitality: 500 Vitality adds 5000 health, 900 Precision gives about 42% critical chance etc. You can see a numbers rising up with any other stat added, with exception of Toughness.
Now lets take a look at toughness: I take a gear with 900 toughness. The tooltip doesn't show for how much dmg reduction 900 Toughness gives. If i have 1000 base toughens (2167 armor) and i take 900 additional toughness i get 1900 toughness (3067 armor). Great, right? I am immortal now, right? Hmm, am i? I have no idea, because i can't see any dmg reduction numbers on my gear. So i have absolutely no idea how much is toughness worth in reality. I guess 900 toughness gives 15 -20% physical dmg reduction and that's it. But it's stupid that i have to guess about it. We should get exact numbers.