To explain what I m trying to say i will describe, what happened to me several times in IC, mostly in sewers.
While running trough PvP area with PvE NPCS I ve got jumped by NB who, after realizing I m a little bit too tanky for him to be easily bursted down, started to pull hostile NPCs, and then using cloak Immediatelly which made those NPC's to attack me so I ended up fighting NB AND several NPCs. then he just kept cloaking and made sure to land a killing blow to get all my stones. Those NPC's respawn very fast in sewers and have quite a long "agro range" immediately after Cloak they switched attention to me and then "stayed on me" even after the NB appeared.
On few ocasions I have even got "jumped" by an NB that already had few NPCs with him. Than he cloaked, NPCs completly ignored him after the cloak.
Is this really how should cloak work now? Seems to me to give a little too big advantage, especialy in an enviroment like IC.