The one-click sort button can over-ride and totally mess up the set sorts in a view. We really need the ability to disable/disallow these buttons for end-users.
EDIT: Here's a good example of why this idea is important. Recently in Viz Talk Judith asked if someone could replicate a viz of the standard College Boards AP Report. (See attached.) It looks like this:
The easiest way to do this was to create two different worksheets and put them side-by-side, hiding one of the columns of States to avoid duplication. Works good, looks good. Now imagine what happens when the user clicks the one-click sort:
The right side is now sorted on score, but the left isn't. This is a dangerous viz to put out there because there is a very good chance it will give completely false information. Even if you set up a global sort, so both sides sort together, when the user hits the one-click sort it over-rides the global sort and now the viz becomes a lie.
(Iain, I really hope your team is working on this and it's high on the list.)
--> Community Manager update [Ciara Brennan]
New feature released with Tableau 2019.2 - Show/Hide sort controls (Feature 103010)
Authors can now preserve the sort order they've set on their worksheet by disabling the ability to one-click sort.