I think I'm liking the new UI, but I think it's necessary to bring back save, undo and re-do buttons....
1. Frequent saving of workflows is crucial and not everyone uses keyboard shortcuts
2. The ability to undo (lots) of changes is a key part of iterating and rapidly building workflows in Alteryx and again not everyone uses keyboard shortcuts to do this.
Looks like there's potentially space to add this to the right of 'help' (I suspect this might be technically quiet difficult) or to the left of 'run', 'schedule' and 'active documents' as seen in the image below.
Out of interest, where has the 'documents' terminology come from?