> So the main improvement to memories I'd like to see is better judgment on which ones to create.

The main improvement to memories is to actually use the memories, and not ignore them wholeseale. Directly from the article:

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Injected memories use up valuable tokens, and an incorrect note can be carried into every session. Loading a note also doesn’t guarantee that Claude acts on it: our documentation on Claude Code warns that longer instruction files reduce adherence

...

It loads only the first 200 lines or 25 KB of MEMORY.md

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The reason it can't create coherent or good "memories" (aka random .md files) is that it cannot recall or use any of them.