Actually, that's kind of what these kinds of games try to do. They don't feed all the info so they try to have players figure it out.
Hence why so many skills and weapons have +, ++, and ++++. The only thing we really can know at a first glance is that the more +, the better.
Yet something with + can be 10% and a different skill can also have + yet be 15%. This game is honestly vague as hell and if it wasn't for datamining, then the content likely would have been at a lower skill ceiling given there'd be less optimizations...
It's just MMO 101... the more mechanics get abused, the more dev's throw stuff to counter or fit that
(Hell, I have to rebalance the game I'm making due to beta demo feedback and it's not even an mmo. Someone that LPed it even datamined it themselves...)