1.there are op classes on both
2.you dont understand the key of attribute the key is not pve and skill resist since thats an addition to the attack element/defense which is basically defined by your armor/weapon, so if you can choose from 3 different attribute / armor item you have much more chance to cover the attributes you need in basic level since if you check it theres always an attribute with low defense thats your weak point with that you can switch your weak point so you end up with a slight advantage if you know how to use it.
3.no l2 is not balanced but try to be and the road to balance isnt starts with making unbalanced changes.
4.than you dont know how to pvp i play since more than 5years now mostly on offmod servers and 2years on official and i see what i see pvp became longer and better.
5.more unique but copy paste too so dont complain about l2 copy things since others does it too.