Select specific playlists on a channel subscription

For example, ChannelXYZ has multiple playlists namely Playlist1, Playlist2, ...

I want to subscribe to only Playlist1 and Playlist3.

Also, I noticed that the current subscription does not group the downloaded videos in playlists that they are available. They're also not numbered or ordered in any way identifiable to me.

So, in short, I would like to

1. Be able to select specific playlists for channel subscriptions
2. Have "Add the numerations to file names in playlists"
3. Skip duplicates in playlists