Hey.
I play a rogue and I like to PvP a lot, and with this lag with over 6.5k online it is impossible as auto attack for example simply does not work.
I suggest for the sake of all mankind and what is holy we set a temporary player cap until the server can be upgraded.
At 5k online there is no notable lag.
At 6k online there is slight lag but manageable.
At 6.7k online melee PvP starts to become impossible.