I loved the start of this film where we see the setup for the movie. This would have been a much stronger film if it was just the prequel to A Place Place Part I where we see how the aliens begin to take over.
Maybe, but that movie would have cost 150M+. I'd say the first 15 minutes of the movie cost more than the rest combined. Could be that one of the big appeals of the first was it's 22M budget. The studio and other producers involved probably wanted to keep the scale of the original to guarantee similar profits.
Talk of trilogy is around and if so I'd expect another 15-20 min dedicated to flashback of the aliens taking over followed by another hour to complete the story.
It's smaller scale but I find its unique in a way. Rarely do we get an end of the world from alien invasion told in such a small scale fashion where we learn little bits of the event piece by piece by characters personal experiences. Remember this story is told from the character's prospective. So maybe they didn't see how the world ended. Instead we're only given what they have experienced along the stories from others.