Thank you for your response and thoughtful comments.

1. I plan to allow anyone with a link to comment but users will need to create an account to edit the design.
2. I aim to include the 10% of features that are used 90% of the time in other graphic editing software like Figma, Sketch, Invision Studio, Adobe XD, etc. I hope that by simplifying the tool, it enables more people to contribute.
3. Feel free to share! I hope to launch the beta app in a month.