The most TL;DR way I can sum up this show is to take a quote from the prayer that's spoken by (most) religious member of the crew:
"... Carry us now through this crucible of fire, so that we may show the world that there is a better world. A world beyond division, and confusion, and fear. Let us discover a world beyond fear."
Even an atheist like me can say "Amen" to that.
The longer version of my thoughts is that this really isn't my kind of show. I usually hate "human relationship drama" stuff because it's usually done so poorly. But I'm surprised to say that this time, while I came for the space travel, I stayed for the drama.
"Away" shows us that "better world," and it's something we all need more of. Especially right now in 2020.
It's all. About. Communication. Instead of showing us how to be more dramatic, neurotic, divisive versions of ourselves like most TV, it shows us ways to navigate through various difficult conversations and situations in ways that are healthy and constructive. How to admit when we're wrong, how to ask for help, or how to extend an olive branch. And it shows us the things that can be achieved when we are willing to communicate.
The first manned mission to Mars is the perfect setting for exploring all of the ways relationships can be stressed and tested. Of course the show has some weaker moments that were soapy or cringey. But it has some incredibly strong ones as well.
If you think it's all just "liberal feminist politics"... I truly feel bad for you. I mean, you're right, that's what it is. I'm just not sure why you that's a bad thing...?
Yes, this is our "globalist liberal future", where people communicate effectively and have basic respect for each other's differences, and we go to Mars.
I guess in that sense, Away is sort of a modern-day, hard(er) science Star Trek.