Add custom code blocks

Is there a chance to allow to add custom block that have access to the internal API (like the getRef or setRef, e.g.).
It would allow to create some “shortcut” blocks and not have to use a lot of existing blocks, which would add so much complexity that hard-coding might be a better option than no-code block.

Maybe it is enough to enhance the current Javascript block.
Add some API for accessing all data (not just getting one row), passing on values to the next block (instead of only saving them to variables) etc.

This would allow for a community-open upgrowth