after following discussions and developments in the BIBFRAME space, it
seems to me that it tries to be too many things for too many people.

I think many of the problems stem from the fact that (to my
understanding) BIBFRAME is supposed to accommodate legacy MARC data
and be the next-generation solution for bibliographic Linked Data.
Attempting to address both cases, it fails to address either of them

In my opinion, a possible solution could be to have 2 tiers of RDF vocabularies:
- a lower-level one that precisely captures the semantics of MARC
- a higher-level one that is designed from scratch for bibliographic Linked Data

The conversion between the two (or at least from the lower to the
higher level) could be expressed simply as SPARQL CONSTRUCT queries.

Any thoughts?