We don't have a Philosophy forum but if we did then I think we would have plenty to talk about. I think right now people aren't sure how far others are in the quests and have rushed through the MSQ. NG+ should be out with an update so we can go back and let it sink in.
Like you, I am kind of overwhelmed. I have a word document where I started just cut and pasting my entire chat log because there was so much to unpack. The themes of the game since 2.0 or earlier are existentialist in nature. I am not a philosopher but on some level understand that what they are informed by is philosophy about the self, free will, civilization, survival, intelligence/artificial intelligence, divinity... all in what has been an escapist medium. It is truly art. I am glad you are finding meaning in it.
One of my favorite monologues in the game besides the one you mentioned was probably around Level 86 in the 4th zone with Urianger...
Urianger and the Loporrits...
Urianger: Your works want not for repair. Yet there remaineth much for you to learn of men, and your own kin besides.
Singingway. Thy name bespeaketh more than the simple marriage of rhythm and rhyme. The songs of Etheirys are beyond counting, and span the length and breadth of emotion.
Maps are monuments to man's pioneering spirit and his devotion to charting the furthest reaches of our star. Many have devoted their lifetimes to exploratory pursuits. To venture unto the highest mountains and the deepest oceans, in search of unknown frontiers.
And thou, my friend. I... Hmm. I do not think we have met.
Puddingway: My...my name is Puddingway...
Urianger: Puddingway... Yes, indeed. A name of deep and abiding significance, I am sure, but one perhaps better communicated through delicious deeds than tasteless words. A judicious application of fae magicks at a later juncture may be appropriate...
And Livingway. 'Tis no easy feat to convey the significance of thy moniker.
Hmmm... When I was a bookish boy, a dear friend of mine was fond of peppering me with questions as I read─to my occasional annoyance. One day I posed to her a question of mine own─what doth it mean to live? After much contemplation, she proffered this answer. The anticipation of a half-read story's conclusion. The hope today's mistake may serve as tomorrow's lesson. The wish that a new acquaintance may one day call thee friend. She believed it to be all these moments and more.
Livingway: I...I want to understand, but...
Urianger: I, too, still labor to find mine own answer. 'Twould be my pleasure to assist you and yours in embarking on a journey of self-discovery and enlightenment.