Crossposting has made populating content on Lemmy easy, and I'm so glad it exists.
However, as I use it often I'm finding out a few issues that I'd like the instance owner/patch owner/mods to weight in on.
Ownership of post: If an OC is posted and it applies to a other communities, any user has the right to cross-post it. The cross post is then owned by the user who did cross post it, not by the user who's posted the OC. Some users may have issues with that, especially NSFW content. Example.
Multi-select crossposting communities: I want to post content that I know from the start applies to other communities. I want to be able to select multpie, and post to them all at once.
Most recently selected cross post communities: Some communities I post to most often, like Boobs. That should appear first for quick selection.
Viewing of cross posted content as read, when any of them are read: I think reddit had some behavior like this. Where if a post was cross-posted elsewhere and you've marked it as read, all crossposts are also marked read. I think it applies here.
Just going back to older questions and catching up.
WRT 1, except for true OC content made by OCC , there really is no concept of "ownership". Everything else is simply "shared". I do agree it would be nice to have the "crosspost" info show who the original poster is. But as on Reddit, it is simply too easy to download an image, and repost it back up as a totally "new" image (with new URL, meta, etc), and all that OCC or ownership or credit to OC poster is totally lost then. old Reddit had a neat way to track where a particular image or gif URL has been posted/crosssed-posted (the "duplicates" option), and it's always fun to see how many times a particular imager URL has made it's way around the different subs and come back to the original sub it was first posted.
I like this example: https://old.reddit.com/r/ScarlettSnow/duplicates/zb6mnk/a_submissive_smile_scarlett_snow/, and this is only one instance of the original gif URL - there are many other copies that were simply reuploaded to obtain new link URL so that they could not be linked to the original.
WRT 2, the idea is good, but it also makes it way too easy for spammers to use. Maybe if limited to say 3 maxium that could be selected at a time?
WRT 3, yes, it's annoying right now to have to search for your own communities to show in the dropdown list. But hopefully easily fixable in future