After someone pointed out the ridiculous mass hysteria angle the second film took, do you really want a continuation story?
They fucked up the logic of the world so hard in the second film that I think a reboot is for the best.
I mean do you really want to spend the first few minutes of this film being told directly or through exposition about how unbelievably fucking stupid people were after a Marshmallow man wrecked shit all over one of the worlds most iconic cities, only for everyone on the planet to collectively conclude it was all mass hysteria? To which they ostracized and cast the original Ghostbusters as outcasts? Or maybe they just gloss over that key plot point and it creates a disjointed lore.
It is just a plot anchor that a film coming out 30 years later shouldn't be weighed down by.