The August 5th draft of Ghostbusters II was miles better than the film we got. It was dark. A more adult version of GB than the first Ghostbusters. It's an awesome read. Check it out:
https://www.theraffon.net/~spookcentral/gb2_script_1988-08-05.pdf
Edit: it's also the source of the "Ellis Island incidents" mentioned in the "real" Ghostbusters III, that being GB:TVG. Most people thought Egon referred to the statue of liberty in GB2 when he said that but he didn't. GB:TVG was insane fan service, down to referencing unreleased scripts of the franchise.
https://www.theraffon.net/~spookcentral/gb2_script_1988-08-05.pdf
Edit: it's also the source of the "Ellis Island incidents" mentioned in the "real" Ghostbusters III, that being GB:TVG. Most people thought Egon referred to the statue of liberty in GB2 when he said that but he didn't. GB:TVG was insane fan service, down to referencing unreleased scripts of the franchise.