Pressing the 'Delete' key deletes the highlighted action - maybe even a toggle for this?

An 'Undo' button in the UI to undo the last performed action(s).

Windows power users know the value of saving even a few seconds of their time with shortcut keys - instances in which we need to delete several actions, such as when we are doing a workflow rewrite but need the original workflow for reference, can help us save some time.

And an Undo button would be great for when we fat-finger the Delete key.