I think you mistake condescension with someone simply informing you that you are wrong. What you're wanting to 'debate' has already been theorycrafted, discussed, mathed out and _proven_ to be bad. Nothing has changed that might affect that outcome, certainly not one more person entering the conversation.
3 points of weapon damage is not minuscule, it is very significant. You might not need to be overgeared for whatever content you are engaging in, but I can pretty much guarantee you are under-geared for the end-game content. Whether or not I played XI, WoW or any other MMO that may have had some inspiration for XIV, does not mean I know anything about XIV. Being an XI veteran is not a credential here for knowing what you are talking about. I could list my history with MMOs, but what would be the point? It doesn't make me an expert on anything to do with XIV, but my work in XIV does.
Your attitude is poor in that you have people coming to you, presenting good information founded in proven game data, yet you remain convinced that what you think is right. Your close-mindedness is what is reflecting poorly on you, not your history with XI or anything else you might want to bring to the discussion.
You're basically stating as truth, many things that the vast majority of the community has long known is wrong. And then you criticize the people that actually inform you of the reality of the situation, calling us condescending. I don't know what you expected, being as stubborn in your ideas. The reason you've received hostility in game for playing ACN, is because is sucks. Coming to the forum and ranting about crappy cross class skills isn't going to change that. And it's no big surprise that you received the same welcome here that you have in game, because your attitude about the whole thing is really crappy, and you have such a strong bias towards what you think is right, that you have no room for the truth.