Welp, you knew this was coming didn't you?
I actually enjoyed it. I always consider the possibility of expectations affecting enjoyment, and w/so much bad feedback here on ye olde TZT, I kindof went in expecting garbage (well, not exactly because I still put a lot of stock in imdb ratings too) so was pleasantly surprised.
I do agree w/the OP that it felt like they could have dug much deeper - that's definitely fair criticism. That said, the thing I disagree w/most in this thread is comparisons to Interstellar. That was an ultimately empty shell of a movie, pure scenery and maybe bits of suspense w/absolutely nothing to say. I thought this at least had more than that. I thought Interstellar was massively overrated, I think maybe this one I'd say is slightly so.
It could have delved deeper into our inability as a species to cooperate and not be self-centered twats, or the ramifications of seeing your entire life and making choices despite that, and yes of course you can always rightfully poke at how bumbling/silly a lot of people are. But I think they did well enough in each of those areas w/out knocking it out of the park.
4/5 matt damons for me, but something i have no interest in watching again - was not "enjoyable" in that sense... a little thought provoking on first see-through was all i expected and got