Kobold Avenger
Legend
5e without a doubt is better than 4e, and I say this as someone who was quite into 2e's Campaign Settings. 4e tried to throw the baby out with the bath water with many things including the fluff.
*Fixed*
Something may have been lost in the translation. Probably best for everybody!
But in retrospect ... "fluff tastes ..."
Fluffernutter! There we go. Good, wholesome, fluffernutter.
4E fluff is way more coherent than the traditional D&Disms...but lacks that Byzantine, hodgepodge WTF Heavy Metal factor. 4E alignment makes more sense metaphysically speaking (thanks to James Wyatt, most likely), but it lacks some entertaining factor of the silly alignment spectrum that weirdly helps with role playing on a practical level.
I'll give 5E points that it has specifically called out Eladrin being Fey rather than Celestials, which is an improvement because it might mean they'll do away with the ties to the Wheel and let Eladrin actually do something interesting again.
I think you hit a big chunk of it on the head... at least for me... Sword and sorcery, weird fantasy, etc. are rarely what I would categorize as coherent. Personally I enjoy D&D the most when it's that messy hodgepodge feeling of never knowing what to expect on an adventure or through a portal or even with a creature you've probably heard of in real world mythology... I enjoy my D&D to have a grounded (at least at low levels), cryptic, Heavy Metal (Though in all honesty it's more Hip Hop for me... think Samurai Champloo) feel, and 2e, 3.5 and 5e D&D lore felt like that to me. I also think I may be one of the few people who also enjoyed the dichotomy of the 9 point alignment system where not only were the powers of Good and Evil an active force but also those of Chaos and Law... I liked that 4e introduced unaligned but hating the simplistic reduction of the other alignments.
With 4e it was like reading a classical mythology book that had been slightly tweaked and given a fresh coat of paint... but was still essentially greek mythology with some high fantasy considerations thrown in. It was ok but it just didn't evoke the same curiosity to read up on it or hit me with the same sense of wonder when reading over it. In a way it felt sterile, clean and not a little predictable. I also don't think it helped any that it was scattered across not just numerous books but numerous products as well.
I hope they keep the Noble Eladrins in the feywild, and give their place in the celestial hierarchy to the Asuras.