From the Wikipedia article on the original book by H.G. Wells, published in 1898:
"Wells said that the plot arose from a discussion with his brother Frank about the catastrophic effect of the British on indigenous Tasmanians. What would happen, he wondered, if Martians did to Britain what the British had done to the Tasmanians?"
Without spoilers, it's pretty clear this slower-paced reboot is asking these hard questions. As a species, can we survive...ourselves?
As for the complaints that the acting isn't realistic, I'm not sure these reviewers are aware of how trauma works. Sometimes our responses are numb, muted, with periodic outbursts. Also, there's some cultural differences here too. Having spent a lot of time in France, I can assure you that tempermental differences apply. Maybe these people wouldn't behave like your family in (pick your state in the USA). Maybe that's normal and OK. I think the acting is spot on in terms of humans dealing with massive trauma, especially from what I've heard from various people I know who are psychologists and boots-on-the-ground therapists who deal with intense stuff like this.
This is a tension series, not a jump-scare action/explosion series. And that, for me anyway, is welcome. Hey, I'm just as much into the swooping alien fighter jet blasters as the next person, but varety is the spice of life, yes? I think this is a super intelligent reimagining - which is neccessary, right? I mean, in the original, the aliens just die because, whoopsy daisey, they forgot about, like, microbes or something. Oh well, your insterstellar civilization just can't catch a cold.
I don't know what the ending's going to be exactly, but if it follows the larger arc of the original, it seems clear that the "unforced error" on the part of the aliens, and the resulting theme of humility that that leaves us, will make a lot of sense. A show that is asking difficult questions about how and why we've manifested the systems of our societies that we have...is a good thing. Now is the time to be asking this stuff.
Definitely ready for season II.