The Ghost archetype felt disappointing to me so I chose to make a simple rewrite pulling some abilities from the ghost monster page lowering the damage and adding cooldowns to them. I also tweaked some existing abilities.
The main things I'm not sure about are:
1. Whether I should move poltergeist to being its own level 4 feat
2. If the glide ability even adds any thing (does a height restricted fly speed work if you are in midair due to falling?)