And as a matter of fact, it took me half a second to realize you didn't mean Secret Identity.
But yeah, maybe it was too late. Hell, maybe it also was too little,because of the context (with it being a weird semi reboot in the middle of continuity), and perhaps also because of the content itself. I remember a text Mark Waid wrote about making Birthright, where he basically talked about why he thought kids didn't connect with Superman anymore. I'd have to find the text if I wanted to be precise about it (the fact I read it in the French edition of Birthright, so in French, doesn't help), but he said something in the lines of "Kids know you can't try to change to save the world and have a happy life. They grew up in a reality where people like Ghandi or Luther King got shot for the crime of asking for a better world, and where Mandela had to spend his entire life in prison before managing to create a society that wasn't overtly racist", and that basically they didn't want to read about a character who only cared about upholding the status quo before going back to his perfect life. He then pretty much admitted that, by his own logic, he should have brought back the "Dirty Harry" (his words, not mine) Golden Age Superman, but that he was too much of a Silver Age fanboy to allow something like that to happen, but that's the reason he gave his take on Sup a bit of a temper (the gun scene).
Not, jus imagine how batsh.t insane the reactions woud have been has he actually done it.