There is a null inside that will lag the server. its small but still i would count unplayable. just run around the server and youll see a small hickup every couple seconds.
Under DisguiseListener.class, the EntityDamageByEntityEvent "onAttack" still has an anti-piracy check in it that makes all damage dealt be 0.5. It's an IF statement checking "12345".equals("12345").
The new anti-piracy is still not cracked/removed. You're allways having 0.5 damage to everything. Try hitting a mob with sharpness 1000, the total damage will be 0.5 =))
Lucky me I had Plugman which helped me find what plugin does that. :)