Many blocks that are most likely to be used in the Site Editing context are currently grouped in to a "Design" category in the Inserter:

While I understand the intention behind this label, it doesn't feel quite right looking at this group of blocks holistically. Dynamic blocks like Post Title / Site Tagline, and more technical blocks like the Query Loop transcend what I think the average user would interpret as "Design".

Framing the Site Editor as a visual theme builder, we might consider renaming this group to "Theme", or "Template". This would feel like a natural evolution given that many of the Site Editing blocks are direct ports of theme Template Tags.

Another option would be to split these blocks in to multiple groups – there are a great number of template tags for us to create... Perhaps there is scope for separate "Template – post", "Template – category", "Template – comment", and "Template – site", etc. block groups?

My instinct tells me a single "Theme" or "Template" group would be a good starting point from which we can refine over time. What do y'all think?