There should be a setting to customize the bibtex entry when exporting.
For example, I really don't want local-url in my bibtex file. But I don't know how to get rid of it.
I usually don't need the abstract exported in the bibtex entry, either. Additionally, the auto key generation, which currently uses the doi, is quite unwieldy when working with the reference in latex. While I know you can manually enter keys, there really should be the option to generate keys in some simple fashion (i.e., author_year, or some such). For instance, the key generation in the old Papers application was quite reasonable.