I tried that, but you end up sounding so bland and generic. It feels like the textual equivalent of the Corporate Memphis art style. I'm comfortable doing this at work because I exist outside of slack/emails, but in here I am what I write. If I delegate this to a LLM, then I do not exist anymore.

What I found useful is to use LLMs as a fuzzy near-synonym search engine. "Sad, but with a note of nostalgia", for example. It's a slower process, which in itself isn't bad.