Hello, i think i found a bug yesterday that was verry annoying for me I have a Dwarf level 4 and i have added the Mastery Great Weapon (Schwere Waffen in German). My Hero uses a great Axe. After i added the Mastery Great Wepons the probability of hittin my opponent has gone down massvie.
The Mastery should help to hit bedder with Great Weapons !!! so this is a Bug i think.