I agree with most of your points but "feckless" come on. I've never heard that word before that useless Samantha B said it now people say it like it's common. again you are pretty much spot on but usually when I see that word makes me just want to discount what's being said. just me, that word is like fingernails on a chalkboard
Would you really listen to someone on an Info Board named "kilquote". I sure wouldn't. Always do your own DD.