When running my plans sometimes a journey fails and I will look through the output to discover why it failed. However if someone else on my team also wanted to figure out why they'd have to do the same, wasting the same time. (Plus sometimes the same person has to look again because they can't remember why every journey fails)
Instead I'd like the ability to add a comment to a journey when it fails, giving a reason to it's failure. Here I could mention why it failed or if I've raised a bug for it with the bug ID etc. Anyone else who wanted to know the reason for failure could then easily understand from the comment left. This comment would also show next to the journey on the plan history section.