Read it - very quickly, to be fair - and didn't particularly enjoy any of them.
I don't want to sound too harsh because I understand and somehow appreciate the efforts behind the project, and the art is gorgeous, but I couldn't get rid of of a sensation of déjà vu. I thought about it a little, and I think that I have understood what bugs me.
All of the out-of-continuity, "auteur" Superman stories I can think of (I am thinking of Adventures of Superman, but there are way more examples) always look and sound the same. In most of the cases we have a classic Superman vs a monster tale in which the menace gets sidelined and the story focuses on some episode of everyday heroism, or on Superman inspiring someone else, or young Clark trying to fit in, or very few other variations on the theme. All in all what you get most of the time is a morality tale of some sort. It's as if they weren't able to write a Superman story without inserting some "moral" purpose in it.
I don't know. I mean, is there really an audience for this type of stories? Does any reader feel the need to read AGAIN about these topics, which have been proposed ad nauseam since the days of Peace on Earth and For All Seasons? To be fair, the problem isn't even the "moral" aspect per se, but the fact that the moral element in this type of works is always very simplistic - and it probably couldn't be otherwise. Maybe is it that this specific medium that doesn't allow for great, "deeper" content? Again, I don't know. But I cannot but think of other publishers - Image, classic Vertigo, etc - which provide better, more substantial content about "difficult" topics, and in general better entertainment.
Maybe it's the character which doesn't allow for better, more varied content. But again, I have some issues with this specific approach too. Either you focus on some episode everyday heroism - and Superman gets sidelined and looks ineffective - or you make Superman deal with some real-life problem - at risk of opening a can of worms because you clearly can't have modern-day Superman punch racist people or cure cancer or end world hunger without sounding simplistic or downright offensive.
Anyway, I find it incredible how hard it has become for any writer to even imagine a Superman story without being openly "moral", formulaic and generally unimaginative. Maybe DC should reread some sci-fi writer - I am not even thinking of contemporary writers such as Ted Chiang or complex guys like China Miéville or Frank Herbert: even older classics like Harlan Ellison or Fritz Leiber could work - and just understand that creating some good, imaginative sci-fi stuff can be more compelling, interesting and memorable than just writing for the umpteenth time about inspirational Superman or Superman dealing with real-world stuff without actually achieving anything.