...dwarf ... are considerably stronger in pvp then humans.
I disagree with this. Everything else being equal, at most, dwarves are slightly stronger in PvP than humans. But that isn't even what's relevant. Everything else is not equal. PvP is almost always decided by heroes (specifically their stats) and borrowed gold troops. Now, taking that into account, ask yourself, is it smart to play dwarf, given they have to use a troop with 100 percent death rate in the event of a loss, even when fighting within their own kingdom? The disparity in risk is comical. Also, if you think their sieging advantage compensates them for this, take a look at the recent honor events on mature and/or merged servers. 90-95 percent of the top performers were human lol.