I think there would still be a desire for the relative in-between setting of just opting out of the bundling. My reasoning is that a community may want to be open to be viewed and commented by anyone so that they continue to grow and have more participation, either by search or random encounter from the /all view, as that allows slow organic growth with relatively few people wanting to go in there and derail conversations.

With bundling, that community will be seen by far more non-members than ever before if a popular link is posted around to multiple communities, inviting a significant amount of outside participation, and the potential for a much increased need to keep things on topic, or to step in and moderate drama from other communities with wildly different perspectives.

Without the ability to opt out of bundling, this leaves only the two extremes of potentially unwanted isolation, or potentially unwanted increased outside participation.

The only other option would be for a community to request their admin defederate from the troublesome community, or from the outside instance entirely, which is using a mallet to solve something that could be done with scalpel.

I do think the bundling is quite nice overall, and I don’t foresee a problem with it being the default, but I do strongly see the need for that middle ground option to opt-out, personally. The way Lemmy currently operates by default is effectively that middle-ground option that is missing from Piefed.