Every version got some good and bad things about PvP.
- Season1 was quite balanced, but there wasn't sd so most of characters was dying by first hit, so they couldn't really defend themselves when someone attacked them.
I think that almost everyone knows how to been killed by ONE hit after running whole castle on siege, fighting 5 minutes in chaos castle or pk'ing and it is NOT a good feeling.
- Season2 balance wasn't too well. When players got really good sets, killing knight was almost impossible for other classes, also the ee started to be too hard to kill (as her support could make one character to kill 3 other). The Season3 was similar.
- Season4 was better than s2, the characters started (returned) to deal real hits and they could hardly damage knight, but with defensive set it was almost like on s2 (except for mg). Webzen also added "sdheal" for ee, which makes her even stronger than (should) been.
- Season5 is similar to 4, but the game is less balanced cause to higher defs with items +15. Now on Castle Siege means only BK and EE, other characters are only for debuffing, cause they can't deal significant damage.