Having multiple identical posts in different groups with distributed replies doesn’t feel ideal to me.
I think this is actually a feature. You’re essentially trying to centralize communities, but communities are decentralised just like instances.
Why do we have multiple Technology communities? Because some people might like the mods or the rules in the other community better or maybe you can’t even access one of the communities because your instance is defederated from the instance with that community.
Just as one admin doesn’t have monopoly on the Fediverse, no mod has monopoly on a community.
Multiple communities is a feature, not a bug.
I proposed an extension of the feature set. The current behaviour is still possible. You can use the added feature but you don’t have to.
The issue for me:
The current landscape in lemmy has a lot of sparsely filled groups - I do not browse by group (filter by subscribed or all and sorted by new or hot).
In this view multiple identical posts with distributed replies are shown. This adds redundancy in the comments and reduces clarity.
Edit: The idea rises the question, how the ownership (or relation) of a post to the group and its replies should be handled. Using an x-post-like approach is just one idea.
