@Dice. I love your post !

Spoiler: Ramblings
Show
I would point out that D&D stopped using Vancian magic after 3x. At least as I understand how Vancian magic is supposed to work.

1e to 3x = want the same spell more than once per day? Memorize it for each time you want it. Plus components (for each casting) on hand required. (I still have nightmares about literal handwritten books of component "accounting" type tracking. Material type, number (and cost) of "uses", and exact location)

Both 4e and 5e don't require relearning the same spell for each use, but do put an effective over-all Daily Limit.


*****
I agree that rewriting the entire magic system isn't needed. All that is needed is for the DM to decide on which spells are even allowed in the game.

I've made comments on how I've tried to better balance D&D's Magic vs Martial.
(Which seems ignored)

Some of my ideas for Expanded Martial Abilities were accepted, along with a few from other members.

I don't really have any more ideas to offer.

But, I did like your post and wanted to let you know.

Thanks for reading.