I'm sorry, but for the time that was put into this new version, it's just bad.
The classes are unbalanced, the bosses are only considered bosses because they have 15x the amount of health and one-hit weapons, the arena just is terrible with slayer OMA, the admins are never on, and beyond the build it looks like the whole thing was rushed.
When the boss isn't being crowded and pushed around, he's using his overpowered weapons and only losing because everyone bought the loving golden wrench.