I'd take an article rewriting service that does all of that, except uses AI so I don't have to pay as much for it!Personally for me... i'd like a spinner/article re-writer service. One thats done by a mass of humans, done by the sentence rather than the whole document. Customers submit articles, re-writers get paid for re-writing sentences!
I'm currently writing a spinner that keeps track of rewrites people do on a word/sentence/paragraph level, ranks them and then suggests them accordingly. So, overtime, with enough people using the service...it could very easily be one of the quickest and most accurate spinners around.
/still coding though.