This issue relates to the recently introduced template creation / editing feature.

When I go to create a new template, the template appears to auto-populates with the following blocks:

• Site title
• Site tagline
• Separator
• Post Title
• Post Content

Example screenshot with emptytheme:

Are the default blocks to populate a new template being considered? What default makes sense?

Some thoughts / options from a theme developer perspective:

a) singular falling back to index
b) entirely blank
c) give the theme a way to specify