Maybe a couple of enhancements to Search could get Bear most of the way to the asks in this thread.
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When you enter a tag in the search box, the completion menu should pop up just like it does when entering a tag in a note. This would address @krssno’s point about having to remember tag names.
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Saved searches. This wouldn’t completely get us Evernote-style filters, but I generally find myself filtering on the same sets of tags day after day; or at least starting with the same sets of tags and then adding additional constraints.