Very few packages are exluded from the patch review initiative. Mostly because teams or maintainers who work on those packages follow a different process.
If you want a package you're interested off the list, you can either simply
branch https://code.launchpad.net/ubuntu-review-overview and propose a change in there
or file a bug report on the patch review tools
In Launchpad you can view the current list of packages that are excluded.