Came here to post my review absent any viewing of this thread.
In summary the whole thing felt like wasted potential to me. The core story of the "shimmer" had huge potential, but a slow story, poor casting, and a ton of unanswered questions left me scratching my head and saying "that's it?" at the end.
First off, the all female cast simply felt hamfisted and dumb. Portman is a serviceable actress, but she's totally unconvincing as some badass marine doctor. The whole Team Girl thing made no sense, justified only by "all the previous teams were male".
What fucking purpose did Portman's relationship with the black dude serve in regards to the story?
No background or lore regarding wtf the shimmer is, where it came from, or what it's intended purpose is just leaves a gaping plot hole for me. It's obviously some sort of alien entity, but beyond that you get no info.
6/10, mainly because of the killer alligator and bear scenes.