Razhem said:
1) to me here is the crux of the issue, Superman except in crazy spin-offs, never takes an active role in political situations, with this I mean he doesn't actively intervene nowadays in human wars (WWII was another time after all), it's what stops him from just becoming the Authority or Miracle Man (if you haven't read it, please do, an amazing story). ...
2) I won't deny that the story that spawned this change is overly political, but I do like the end result, just hope the guy that keeps the story going is less preachy.
1) Your Miracle Man reference is likely more spot on than the Dr. Manhattan and what I think the author of that link I posted is worried about. If I recall correctly, by issue 15 they've (MM and associate) remade Earth civilization into their idea of an ideal.
Superman can be apolitical, but renouncing national identity, I think, goes beyond that.
2) I'll give the writer this: fine, you've shaved off a bit of his character, curtailed a bit of who he is that provided drama. Now what are you going to do with him? Given how over powered this character has become (originally, the line was something like, "nothing short of a bursting bomb shell can penetrate his skin" suggesting he is very tough, but not invulnerable to everything) he has been difficult to write good stories for. I think that job has just become tougher.