So yeah, I had some time to kill near a cinema so I went to see it. It's exactly what I was warned. A tepid script that borrows a little too liberally from other films, and bland and forgettable characters aside from the actual Mummy herself (Sofia Boutella does a fine job making her feel memorable enough and her design is very good), who is unfortunately marginalized in favour of more Tom Cruise running and squinting. Despite the film being called The Mummy, she isn't really the focus at all.
The whole Dark Universe set-up is obnoxious and takes up at least a third of the film, leaving the actual Mummy film half-baked, wasting some decent effects and good design work. It also felt very disconnected from Ancient Egypt, with only the brief prologue actually taking place there and the rest of the film having next to nothing to do with it. The severe tonal problems, as mentioned by a lot of folks, are a real pain, as the film can't decide if it wants to be light and jokey like the 1999 reboot, or serious and dark like the older films. The rapid changes from scary to funny works for the Fraser film as it's intentionally a light hearted adventure film with a few good scares.
This film by contrast is set in modern day, filmed with a dark colour palette and lots of self-serious dialogue from Russell Crowe, yet has numerous silly gags thrown in at random times. They could not settle on what they wanted the film to be.
There were too many cooks in this kitchen.
The Dark Universe label also kills any possible tension as naturally all the major characters will have to survive for future films. Even the Mummy herself is defeated but it's made abundantly clear they can just bring her back at any time, if they want her in a team-up film or whatever.
That's the real problem with making a universe based around the monsters that are the villains of their original films. Suddenly Dracula and Frankenstein's Monster and co can't die at the end of their films, they have to survive or be not completely dead so they can be in The Revengers: Cruise Control.