The limit was put in place a few years ago in an effort to troubleshoot the severe lag (yes even worse than it is now) issues the game was experiencing. A lot of people rerolled off eviscerators b/c of the hit lag, etc. It was only meant to be temporary measure, however, here we are around 4 years later with it still in place. The server has moved to AWS now, and are more or less stable. I don't even know that the team that was working at NCSoft when the limit was imposed is still there? As stated above, the limit only hurts legit players while 3rd party program users bypass the limit.