You can't compare Marx Bros films to Ghostbusters (Or films similar to), that's two different periods, let alone styles.
Improv, while bring up some great stuff, is very dependant on the people who use it, we know Bill Murray, Dan Aykroyd and Harold Ramis are good when they do it, but it's not always pulled off perfectly by everyone.
Mallory Mike, all I can suggest, is write what you feel fits best, it's not like a you'll have millions of cinema audience who might not like it.
Anyway, goodluck with it, and personally, I thought that scene with Egon and his Ardith was nice, as it was probably a isolated bit of sympathy in probably a story which a majority of is humour driven.