I've got to go with Lost Poet here. Clear is good. Lively is good. Expressive is good.
Vague, muddled, unclear, are not so good.
If read widely enough, almost any piece of writing will upset somebody. Lots of folks tried to improve on Shakespeare by adding and taking parts out. If the piece of writing has enough life to it, it will thumb its nose at everybody and get away with it.
If a piece of grammar or usage has enough energy and substance to it, it will remain lively in the language and will be used. If not, cola will remain a word used primarily about soft drinks and will not be used very widely to speak about the plural of the punctuation mark colon. That doesn't mean that the word is bad, it simply means that it's being forced out of circulation, and that the majority of speakers of English don't turn to it as their first choice, and that when they hear it, it sounds stilted and somehow wrong. I like the word "lanting" myself, but it's simply obsolete and a bit revolting, and folks don't even like to imagine it has anything to do with their beer. It's quite possible that the word won't be making much of a comeback in the near future.