No, what I see is someone willing to flip everyone the bird just because they think they're right. Your excuse? MMO evolution?
I don't play FFXI because of Tolkien. Thus, his concept of elves and orcs mean nothing here. What I do care about, however, is a company maintaining loyalty to their fans and adhering to the foundations of concepts they establish. What you are reaching for is essentially a retcon. Do such things happen in the creative world? Sure. Are they always for the better? Nope. Yes, SE could turn SAM into a main healer tomorrow. It could even be the best healer in the game. That doesn't mean that the move isn't dumb. And again, I'm puzzled when continued implications of SE's developmental incompetence arise, for anything but RDM, they're wrong. Yet, for years, we've had people trying to convey that something isn't right in Vana'diel.
Some of us do realize that player trends and concepts can reach forks where veering from the established might be easier, while at the same time displeasing a small amount of players. However, erecting giant brick walls at these forks to never be broken because they don't interest you or don't think they can work? No. By all means, cling to the manifesto and its egregious disservice of our current description relative to game mechanics. Could SE fix it so we could truly be the buffing and debuffing demi-gods? Sure. But then again, that's an eerily similar blind faith like we had when they said the planned to move RDMs up front. You might be waiting a very long time for them to deliver on a "promise".