I'm sorry that you put a lot of effort into coming up with the list. So far everything you describe is accounted for by what Diznario wrote plus the one new insert that has been previously discussed.

The modification of "shuffle" items is new, but not very condusive to a balanced interface. It would create too many options that would rarely be used. It is best to keep "shuffle" to a MODE of playback. The "Mix" item we discussed in the begining of the thread would handle the shuffled case. Everything else can be handeled with the existing options plus the new insert that will be implemented (find the other threads).

You only need the following options to cover everything:

Insert, Enqueue, Append, Mix, Replace

By definition, replace should stop your current track and switch out to the new selection. Same as selecting to "play" with the short press.

Being able to redefine the short press (default) would be a very nice new addition.

Bruno