Within a Show, play the added playlists one at a time, in succession, then loop forever
Right now it's possible to add multiple playlists to one show. But they all play at once and on-top of eachother.
I would like an option to make the playlists play in succession.
If I add 2 playlists, first play #1, then #2, then loop back to #1.
Right now you can use the "hide playlist" item and manually set the duration. This way you can have them play in "fake succession". But when adding new media or a new playlist to the mix, this involves a lot of math to calculate new total duration and new "hide playlist duration".
This suggestion is similar to the Sub-playlist suggestion, the result is the same, but this way you don't need to add another element on the menu bar.

Indeed, what you are describing will be available through the sub-playlists item. We are releasing this really soon, so there is no point into also including this.
In any case, this feature might made skip adding another “entity” in the system, but it has implications on the menus of the Show editor and the layers shown on the right of the editor. And, most importantly, it would cause additional feature requests from users that would want to build on top of that.