Also just watched it, after wasting two evenings plowing through 5 hours of Oscars crap (and that's without ads, don't know how I watched that for 7 hours straight live 20 years ago).
Everything seems very cheap, like a TV movie of the week, a Sci-Fi 'special'. Lots of 'green screen', everything happens in small groups of people in small locations, with bad, obvious visual effects. Like a 15 year old TV series, low quality. It does feel rushed, none of the predicaments feel important. Similar altercations were done better in Dante's Peak, Volcano, and War of the Worlds.
But... I haven't felt that excitement and awe, that I felt here during the last 40 or so minutes, for a long time, because I haven't watched any trailers, and didn't have it spoiled.
There's so much more than can be done with all they revealed and showed. Maybe exactly in the format of a TV series.