This sums it up nicely. I can't help but feel it would have been much better off had they worked to make it a continuation of the franchise rather than a soft reboot. They could have used the originals as the foundation to provide historical world building context. Even if they couldn't get Murray involved they probably still could have gotten Akyroyd and Hudson involved as a way to bridge the old and the new, and it still could have been an all female cast.
Instead, as you said, it came across feeling like a parody of Ghostbusters. I would have enjoyed seeing something that continued the line, something where Ray and Winston were hanging up their proton packs and seeking out their replacements (thus leading to finding one or two of the new characters, who then find the rest), and build from there. That could have been something to expand a new series with but now the franchise is pretty much dead until the stink of this project wears off.