What I saw left me underwhelmed

Rating: Null/10 (30 March 2017)

This is basically a placeholder review, which is why I'm not rating it. I saw it on a plane and missed maybe the first half hour, so I should see that before I come to any final conclusions.
The creatures are imaginative and probably look pretty cool on the big screen, and the acting is pretty good, but there doesn't seem to be much story. The movie - and this may in part be simply because of where I started watching it - seemed more an excuse to show off a bunch of crazy creatures than anything else.
I'm surprised that something written by JK Rowling is so simply plotted; perhaps she needs the space of a novel to create her magic.