Thanks for your feedback. While it's true that tools like PacketEvents offer low-level control, the idea that all cheat clients bypass event-based Bukkit anti-cheats is an inaccurate statement.
Our anti-cheat uses advanced logic to detect 'ghost' cheats, even subtle ones. We rely on progressive violation levels and a detailed analysis of in-game behaviors that allow us to effectively catch 'ghost' speedhacks, reaches, and fly hacks.