I kinda agree with that. It was a tragedy, but that place was already a mess to begin with, a few more dead bodies really didn't make a difference, these people were already down on their luck from the start.
But I gotta agree, in past games there would have been at least one character who would have tried to help these people and rebuild. In VI, you have one character so moved by the destruction that she gives up the fight to care for others. X has the team help Kilika as you said Ren.
Ashe seemed cold and selfish throughout the entire game, so the fact that they kept it moving doesn't surprise me. I think that's the point of the developers - in an interview one said that the playable characters aren't necessarily good and the antagonists aren't necessarily evil.