Feature Idea (one per thread):
When adding custom fields in the Custom Type builder, add support for a default value in addition to the placeholder value.
Issue that it solves:
There are often scenarios where a default generic value will be appropriate most of the time, but the field still needs to be changable for when the user wants/needs to change it.
An example might be a Testimonials Slice. We want it so the user can change the title ("Hear from our customers"), but if not they can just leave it as the default ("Testimonials").
In practice once the design for a field included a Default Value, whenever this slice is first instantiated it should pre-fill with the default value.
Another example maybe where our founder "Tom Jones" writes most of the blog posts, its not the most refined solution, but he could be added as the default author for new posts, changable if the user desires to.