2 million active players is a lie. The are 2 million registered accounts. At the moment there are less than 15k active players, it's easy to calculate. I think a merge is happening soon.
The avatar of war set has base critical strike and gives 450 critical strike bonus for a 2 set. The Ancient weapon 2-set gives 450 critical strike too.
The unstoppable hp boost is awesome! we don't have to waste that much HP pots now. Also I notice the damage buff on Sure Strike, but it's still too weak imo.