I would also propose a role as "Super Mantainer".

They should be people with good background in Debian packaging, no need to be programmers, but also being a super tester would be appreciated.

They could promote packages already tested but orphaned from their original developers.

They should be able to fix any minor problems in packages without the need of permission from maintainers. Things such as

- Not proper package description.
- Incorrect section. Very usual with theme packages in section System.
- Lack of icon.
- Dependency problems.

This way I can think in a good bunch of packages that could be promoted easily.

It would also be a good way of polishing packages.