So there are two main objectives......helping to improve presentation and helping to improve the application of language (words, spelling & grammar.) I still think the reward and incentive aspect could be problematic without functional support from Steemit.

I was thinking that you could have a new topic called 'Pre-publish' where an article could be published for critique before being published to the appropriate topic for the subject matter with wider visibility. The problem is any created post is visible immediately to the whole Steemit community. There is also the issue of privacy before the article is ready. There is no way yet to form a private group as you say.

You could have two new topics, 'Presentation Critique' and 'Language Critique' so that people can post under the appropriate topic for their subject matter, but also post a copy to the appropriate critique topic depending on what kind of feedback they are looking for. General feedback on the subject matter of their post will remain against the original.

Within 'Presentation Critique,' it may be possible to offer a service to improve important posts on behalf of someone who is willing to provide a reward......though i'm not exactly sure how that would be achieved.

After a while, hopefully a culture would develop around the process and a general improvement could be forthcoming. It really is a very exciting idea. Well done sir.

Just thought......you could have tip or how to sheets posted to the appropriate critique topic.