I seriously doubt that Nicieza is telling the truth about this, but eh what i do know.
Anyway, even if Bobby being gay is a retcon is not like it matters, i don't think that it makes the whole idea a bad one,retcons aren't inherently a bad thing many of the stuff that we like about modern characters are the result of retcons. Alfred being Bruce's father after the Wayne's death? that wasn't a thing until 1986, Lex Luthor being a corrupt business man? same, hell half of the stuff that people like about Wolverine are retcons. Some aspects of Matt Murdock are similar. Some of the things that i like about Norman Osborn (my favorite Spidey villain) are retcons too.
So, Bobby was a closeted gay man that repressed his true sexuality out fear, instead of just being manchild whose relationships failed because he really didn't know what to do with his life?, sure i can buy it, is not like is impossible to happen in real life, even in today society when we are more accepting of this sort of things, as someone that is not gay, i think that is good too see that kind of representation in comics, i wish that they have done a better job in the execution part because it was simply not a good one and feel more like Bendis whim that actually good storytelling. But some good stuff has come out of it, it wasn't my thing but i know that Sina Grace's Iceman has been very important for young men dealling with something similar in their life, is always good to see that kind of positive impact from our hobbies.