One thing I miss from devbukkit was the ability to add co-developers or contributors to your resources, and they were able to edit the resources page, upload updates, etc. Some resources have more than one developer, or just have people who update descriptions and documentation. It would be great if this ability could be added to spigot resources as well
the contributors field is just a text field with no effect on permissions? if thats the case, +1 on this suggestion, more control is always nice.
Use team accounts. We don't write the resource manager. You can suggest it here: https://xenforo.com/community/forums/resource-manager-suggestions.65/ but I don't think it will ever be implemented.