1. Gobbledygook.

2. Preferably, or, a mix of explicit setting and a list of criteria the user can set to develop a vetted list to choose from.

3. Trusted should be a separate, private list. Not everyone I follow is "trusted." no one needs to see the list of those that I do unless I wish to share it publicly. As such, the list should default to private, but should be allowed to be shared with another nym or just made explicitly public, with annoying warnings before doing so.

4. I'm not sure what you mean.

5. Lists should be agnostic as long as they are defaulted to private.