So this may already exist, I haven’t as yet spent much time in Blocs. I was thinking how nice it would be if there was an option to create designs (themes) that could be exported and shared. They could be shared for free or a marketplace or both. Ideally those themes would then be editable, thereby creating evermore customization. This would simply lower the bar and speed up website creation for new or even experienced users.
Templates is an existing feature of Blocs
There are a few who sell them already for example
You could make your own ones available if you wanted too.
This also applies to individual Blocs. Which can be saved and exported and shared.
Welcome to Blocs!
You can check the Blocs.Store marketplace, which is exactly what you are talking about.