I rarely use the forums but I really wanted to write about this manga, I've been following it since around the first 10 chapters or so, must been like 2-3 years by now ?
I love this manga to be honest, I understand it can feel "rushed" at times but I believe it's intentional, MC is when we get down to it and adventurer, not the "kill monster, do dungeons" kind of one, but a true adventurer just seeing all there is on the land, this makes the speed understandable, he's know so many people, seen so many things, if he were to "write" (obviously be doesn't, canonically at least, but the author shows the story almost like the memories of him) everything it would be unending, so we go to what's more important, this manga shows perfectly the price one must pay for being pretty much inmortal, MC is rather human, so he gets attached, and he eventually has to deal with the fact every single person he knows (even the elves, normal ones not the other high elves) will die before he does, he will see generations of generations come and go, if you think about it, someone as timeless as a high elf would probably experience time in a different way, this too in my opinion shows why the pacing is as it is.
The way MC uses his godly powers is well done too, he knows perfectly well how absurd he is, this isn't some power fantasy were he will show everyone how strong he is and they will all bow down to his might, his power is honestly terrifying and he comprehends that, he had enough empathy and self awareness to understand how it affects the world and those who dwell on it, so he uses sparingly and only when required, or when at least he feels it's required, it's really mature and quite dissimilar from how power is usually used in fiction.
His relations are obviously just as important as the passings, they feel really natural, I guess the fact no one acts too much like a trope or a dere helps, they are just as much a part of MC as MC is of them, just like in real life, we influence others and they influence us, the reality is Aesir wouldn't be who he is currently if it wasn't for his master's, Kaeha, Wynn etc.
I could keep writing but it would be more of a rant at that point, overall all I have to say is this manga has been with me for years and it's made me think for more hours than I'm willing to admit, it's a beautiful work and an ode to humanity (or the humanity of Aesir), I recommend this to anyone and everyone who reads this, the manga has this special appeal that most works of the genre (I'm an Isekai junkie) lack.