I found the game didnt do justice to Vances flavor but reading Vance helped D&D feel a little better it was still the part of the system most often hacked back then.I know the OP mentioned Vancian Casting as an example of undesirable subject but, here I go: Vancian Casting
Not as a game mechanics - that is not being discussed here - but as an in-game (fluff) property of magic.
5th edition. What I love is that it replaced 4th edition...
The settings of 2E, fluff, lore, niche.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.