More progressive and liberal texts, instead of strictly conservative Christian social teachings. Would like to see him more educated in materialist texts. He seems to explicitly favor nonmaterial dogmatic perspectives and completely disregards the rest.

I mean his non-fiction work. His fiction is good, but, for example, in his book "Mere Christianity" he explicitly supports reactionary Christian teachings during the war. When more forward looking writers were talking about new takes on sexuality and women's rights, he was still saying woman should be subservient and that homosexuality is unnatural and sinful.

It's not even like he is catholic, he was Anglican, the church itself distanced from those views before denouncing completely. I would just expect someone who is so well read to have some sort of proactive view on social issues, especially considering the time he wrote the book was a period of social upheaval. Instead of understanding and considering the new morals of the generation, he doubled down on ideas and principals that quickly become dated, now bordering on nefarious.

I love Narnia, but he himself has awful takes when it comes to social structure and rights.

That's very interesting because CS Lewis is particularly bad at contextualizing and deconstructing his arguments in his non-fiction work and utterly failed to locate the conscious shift in post-war Europe. It goes to show that reading a lot is not enough, reading diverse texts is more important.