Frankly, it's not even the feminism that worries me the most. I'd be fine with the current cast if the 1984 cast could "pass the torch," per se. When Harold Ramis died, so did that opportunity (along with this movie). Such an old franchise needs to segue into a new cast.
What does worry me the most, however, is how gorram bad the movie looks from the trailers. The 1984 special FX hold up BETTER than than those in the upcoming movie. Also, any of the cast that's still alive will (allegedly) only play CAMEO roles in the film, and not even as their original characters. You need to actively try to execute something that badly. The movie looks below B-movie level.
I'd rather watch Chef or even The Room than have to sit through that trash. Hell, those 2 movies are actually so bad that they're good. They have charm to them and lack any precedent from which to piss off older fans.