Fans want a movie with the original crew busting ghosts one last time. That isn't what they're going to get. Sony wants a movie that can launch a whole new franchise of Ghostbusters films, merchandise, etc.
And what's peculiar and annoying is that if everyone would give up on the former - which will never be done satisfactorily, given the personalities and timing - the studio could probably do well with the latter.
Yes, us old folks would be unhappy - but that doesn't mean that the project wouldn't be successful or that it couldn't be done well on those terms, for a new audience
Whereas, frankly, if we get what we prefer - the old crew busting ghosts - it's almost guaranteed that the project that results from this process will disappoint and annoy us.