Refined doesn't mean any of those words. Here's two definitions from Google:

> with impurities or unwanted elements having been removed by processing.

> developed or improved so as to be precise or subtle.

It basically just mean improved, which most people would agree.

In fairness, that keyboard switch style hasn’t had 1mm off travel before, so don’t you think “refined” is somewhat accurate?

I read that as "elegant" not "made better". It's possible that people could read it either way.

Yes, that's by design; it's a purposefully ambiguous choice of words that be read either way depending on what the reader's subconscious wants to hear. Either way, they don't have to admit that they were wrong, customers that hated the old now now feel relieved and vindicated, and people are probably more likely to buy the new one. That particular choice of words is probably the result of millions of dollars of marketing psychology, focus groups and A/B testing.