I’m pretty sure we tried that once and it turned out to be worse.
Slugs became really_really_long_in_some_cases. Also, with no sign of them being immutable, they became a naive_and_mildly_embarrassing_reminder from the past, before you understood the actual goal (and Beeminder) as well as you do now.
Two things:
I think there’s a desirable and not-too-hard #UVI in don’t touch my slug.
And here’s an enormously long discussion about what might be done about the situation to make slugs, titles, goal statements, and everything work better together.