Well, that and going for more slapstick comedy than intelligent comedy.
Case in point - explaining the proton packs in 1984, less than 30 seconds and one shot, one of the best subtle moments of comedy in the franchise. 2016 - 3 minutes of Melissa McCarthy leaping about trying to control the proton pack like its an overpowered fire hose.
But that's neither here nor there.
As for next year's Ghostbusters, I'm warily looking forward to it.