I didn't really understand that this feature created a new post until this evening when I used it for the first time. I thought that it simply allowed you to share one post to multiple communities, and so cross posted my short story to creativecoin community as fiction is very much relevant to what they are about.
I can see the benefits of people using the function as a curation machanism, but I think that there needs to be some way to post to more than one community without replicating a post developed in the future.
I'm not going to be cross posting my own content again after learning how it works, but there are many types of content that legitimately belong in more than one category. Also, some of the long standing steem communities that are none genre specific, like powerhouse creatives or OCD for that matter, are good examples of communities that someone might want to post in while also posting in a genre specific community.
While this new feature really is a great leap forward I think some things need ironing out.