I know the feeling of publishing and then a week later looking at the stories list and seeing a headline that doesn't work--even though I ran and re-ran it through my head a dozen times.
The main thing I change are headlines. The only thing this does is change it on the page but the link address keeps the old title. So not sure if meta data would be affected.
I'm on the fence. I like things being up to date, but then again, when is enough enough? If you have a less than a couple dozen articles then it's kind of easy to update them regularly, but then after a while of well over that amount, you'd have a maintenance nightmare.
Either way, if we continue to find fault in our early work, that must mean we are evolving and improving our writing skills.