Finally watched it!
After a conversation with my 9 year old son, who is a big Ghostbusters fan, I decided I couldn't comment on the new one until I watched it. So, I did. (spoilers ahead)
The first 20 or so minutes felt like a really cheesy episode of Charmed. It wasn't horrible, just super cheesy. Some of the Hemsworth gags were funny, though some were pretty forced. Some of the one-liners were okay. I really thought Kate McKinnon's interactions felt forced. Her "tech speak" was just stupid. Overall, Kristen Wiig's acting was pretty good.
Cameos by Dan Aykroyd and Slimer were funny. Annie Potts was just okay. Bill Murray was okay.
The angle of the creepy janitor being the bad guy was done poorly, I thought. Him taking over Hemsworth's body and the big ghost fight at the end were cheesy.
I think they could have used the same cast and some of the ideas and made something worth watching. Little bits were okay, individually, but as a whole it didn't work.
I wanted to like it. I like the actresses (their movies, not necessarily personally/politically) and I liked the idea. I just didn't feel like it worked.