Yes, I'm planning to add support for showing the entire Deep Sea as PVP in the next day or two. I may try to add the ability to auto detect that and altitude exclusions from True PVE.
Safe zone indication worked for me in the Deep Sea safe zone. Make sure to turn off vanish as part of your testing, as the game may not apply safe zone status when you're vanished.
I'm confused that you're enabling Dynamic PVP's Deep Sea events if you plan to have the entire Deep Sea be a PVP area. This seems like a needless hit to server performance.