More precise, according to whom? If PG is explicitly defining brevity as fewer characters, then redefining it to “elegance” is to simply ignore what PG said and replace it with something else. Perhaps that indeed is a better working definition, but if we’re commenting on PG’s articles then we need to look at what he actually said and not what you wish he’d said.

If you want to write your own articles and explicitly replace brevity with elegance, don’t let me stop you.