Actually, I enjoy tinkering with published adventures, which is why I'm the one who started many of the "Enhancing" threads on this forum. I just think the degree to which that tinkering is necessary to run the pushed adventures at all has been exaggerated.
It's hard as hell for level 1-9 PCs who blunder into Ravenloft to get out. The PCs in the Vecna adventure are higher level--and, based on the spoiler post upthread a bit, have some special circumstances working in their favor.
I actually think that would be a great idea. Pick the best 15 or so AL one-shots--because they do vary widely in quality--and compile them, with full maps and artwork. Include a few that can be strung together into a mini-arc. I don't know how practical such a project would be with the licensing agreements, though.
Personally, I feel that "TTRPG perfection" is a myth. Tastes differ and times change. There's no perfect game, just a perfect game for your table at a particular point in time.
Case in point: some people prefer less detailed lore so that they can make it their own. I'm not necessarily one of them, but I'm sure I've seen comments to that effect on the board.