Since "Released ROMs" is prioritized above --prefer and --avoid, the only way to include a specific unreleased alternative seems to be using --exclude on the released ROM, which doesn't work for betas etc. that have the same title. Using --prefer-prereleases isn't an option since that replaces everything with beta versions.
Right now --prefer only affects versions of the same region/language, so a high priority --prefer (maybe --include? or call the old one --prefer-version or --prefer-variant?) would allow a lot more flexibility.
Since "Released ROMs" is prioritized above --prefer and --avoid, the only way to include a specific unreleased alternative seems to be using --exclude on the released ROM, which doesn't work for betas etc. that have the same title. Using --prefer-prereleases isn't an option since that replaces everything with beta versions.
Right now --prefer only affects versions of the same region/language, so a high priority --prefer (maybe --include? or call the old one --prefer-version or --prefer-variant?) would allow a lot more flexibility.