Integration of BetterBibTex
The functionality of the BetterBibTex-plugin should be integrated in Zotero. Because Zotero is mainly a tool for academic writers. And most academic writers use LaTeX for writing their papers, thesis, etc. Therefore this should be a standard-feature.
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BBT being a plugin, maintained by someone with deep knowledge of advanced BibTeX workflows that aren't appropriate for most users, is entirely appropriate. Extensibility is a feature, not a bug, and it's a reason to use Zotero over other tools.