1) Aeria doesn't host A.V.A anymore, it's now EnMasse Entertainment, they're decent.
2) "Almost 0 hacks" there was an update recently [4 days ago] that patched the only hacks we had here, currently none work. Most of the cheat developers who made great cheats left to sell their own cheats, or were busy with real life, like school.
3) If you have a bypass, yeah you can use Cheat Engine, however it may not always work since Heartbeat is being implement and removed randomly.
4) Roomhack and gunadders are patched now, Namechanger is possible still, but since you're aware of the older cheats, you can't change your name IN the room, it has to be done in the lobby then joining a room will change your name.