The above crash is known and will be fixed in 2.1.
Occurs due to "damage_before_detach" triggering at the same time as the ghost dying.
This won't typically trigger for Honeygast, as they utilize damage phases rather than "damage_before_detach."
For the time being, I recommend just disabling that. (By removing that line, or modifying the value to be 9999.)
As for Fang's grabbed sprite not glowing, this is intentional.
This occurs for Kamnspi, and one other ghost as well.