After lvling 70+ start noticing that some Stats are quite unbalanced and also loose importance, like Ferocity or Agility, it seems not worth enuff even if you want to build a rogue class character. you need to end putting almost all stats points on Toughness. So My sugestion is that each STAT increase more things than just 1 or 2. For example:
Ferocity = increase Critical chance and Critical Dmg ( so it will worth to maybe use a lot of points on it)
Agility = increase Atack Speed and Dodge Evasion and a little of movement speed ?
Toughtness = increase HP and Resistance
Wisdom = increase aliment chance and Elemental dmg ? or willpower

well, i have a another suggestion too but may i will create other trheards with it corresponding tittle,
hope you think about it, and be the way sorry for my english, not my main languaje.