There is the gender element and the nostalgia element, but for me at least, any attempt at a Ghostbusters reboot is futile because Ghostbusters is misunderstood as a movie. It is a comedy. It has special effects. But at its core, it is about the Bill Murray character's development from a juvenile-type who seduces co-eds to a man who is capable of a serious relationship with a woman. The key scene is when Bill is in the apartment with Sigourney. As a kid, I always took it to be comedy, but now that I am older and wiser, I see Bill showing a vulnerable Peter Venkman's attempt to connect with a real, accomplished woman. The sequel didn't have this kind of character development, which is why it is so forgettable. The Ghostbusters reboot will no doubt do well enough at the box office, but its longevity will depend on if it can replicate Bill Murray.
I think you're right, Brother. There is Ghostbusters the movie and then Ghostbusters the concept. I would say the reboot is either confusing the two or simply not trying to differentiate. I read a review the other day mentioning the reboot has elements from The Real Ghostbusters. And from the production stills and promotional materials, the reboot does look quite cartoony, which orginal Ghostbusters was definitely not.