On-The-Go Playlists

My old iPod used to have a great feature that would add the currently playing song to the "on-the-go playlist" with one or two clicks; this was great if you were listening to a long playlist or folder and wanted to remember a few key songs (or if you were listening to a new album and wanted to save only a few favorite songs).
1. Is there a way in the latest DSub release to add the currently playing song to either a particular playlist or a generic OTG playlist (for an example, see Neutron Player, which allows you to update multiple playlists at once).
2. If not, would you consider adding such functionality?
Thanks!
1. Is there a way in the latest DSub release to add the currently playing song to either a particular playlist or a generic OTG playlist (for an example, see Neutron Player, which allows you to update multiple playlists at once).
2. If not, would you consider adding such functionality?
Thanks!