Disagree. Massively.
You could replace the four female leads with male leads and it still wouldn't be funny. The fact that the leads are women doesn't factor into it, it's just a nice way to deflect criticism by a director/writer who can't take criticism and a studio that desperately needs a hit franchise.
A sequel will kill any hope of a Ghostbusters franchise dead. Not because of women, but because as a comedy it utterly fails at the one thing it should do, being funny.