Watched it in the theater. Personally, I found Afterlife much better. Frozen Empire has many, many faults that completely surprised me (in a bad way). Too many “main characters”, the side “ghost friend” story was just stupid, the end resolution doesn’t make sense, and the teenager that knows how to do everything for the sake of knowing everything is just an overused trope that if I see again I might go postal. On top of that, the original cast barely has any impact on the plot and movie.
They were clearly trying to set up for spinoffs (girl, lab, family, ghost world) to squeeze the IP, but considering how badly frozen empire bombed I am pretty sure that this is the last “Ghostbusters” for a while if not forever. What a pity.
I don't know, the ending made sense to me, though a little contrived (they have nuclear proton packs, but no one had a lighter or a match or could find a way to produce a flame, until ghost girl saw the error in her ways and saved the day?) OK, little formula. But no sequel will ever be able to match the original, and that's OK.
Plus, Paul Rudd is a likable enough goofball. Akroyd had a significant part, but Murray, Hudson and Potts were just essentially cameos.