Ghostbusters is a mainstream blockbuster, and like most of its block-busting brethren the movie isn't exactly experimental when it comes to its narrative technique. Our A plot follows the Ghostbusters on their journey from broke academics, to celebrity paranormal exterminators, to public enemies, to saviors of the city (and maybe the world) when they defeat the evil god, Gozer.
Then we've got the B plot of Venkman trying to date Dana, which ultimately gets woven into the A plot when Dana is possessed by Zuul, the terror dog servant of Gozer. The whole thing end tidily with the defeat of the monster, and Venkman and Dana sealing the deal with a kiss.
So, yeah, nothing revolutionary here, but why mess with perfection?