Thanks for your response! I find that the number of people who actually take GKC on is quite small - most either agree in silence, or disagree but have no response (and subsequently no good basis for disagreement) other that to say that "he is bad" (or stuffy, or Victorian, or some epithet supported by nothing in particular) or that all things are a matter of opinion and taste. So dying? Well, I hope not

, but eager? Sure, just as a physicist who has found an unheard of scientist whose theories explain all phenomena hitherto observed and turn all modern physics upside-down. Or what would you do if you found an unheard of writer named "Tremblepike" who wrote on every subject under the sun in every imaginable genre and predicted the course of events in our time better than Nostradamus, and was kept out of the public school curriculum because he makes enemies of the Faith look like the bumbling thinkers that they are, only as a result nobody had ever heard of him, so they look at you like you are crazy?
So yes, I think he can enrich the thinking of all Christians, including Orthodox Christians. The man who turned CS Lewis from atheism deserves a little more respect than what we give him. He just accomplished so much that the mind can hardly take it in. He cannot be simply "read". He has to be discovered.
I don't think there's any contradiction, even seeming, though. The thing is that the critics generally think the public, the common man to be stupid, while, he, the elite specialist, who knows so much better than they, ah, now HE knows what good art is! So they think that if it is popular, it is poor, because "Bah! The public! What do THEY understand?"
Since the critics are in opposition to the public, rather than being representative of the public, there's no contradiction. Chesterton was always standing up for the common man, who is generally right without being able to articulate why, against the snobs and elites imposing their own anti-man and anti-God visions on him.
But I certainly agree with what you say on possessing attributes.
One thing I see, thinking about recent revelations, is a direct correlation between the insistence that there is only taste and preference and a general denial of truth, and so that kind of attitude is on a collision course with our Faith.