In large workflows, especially those involving branches and iterations, there will come a time when it fails (yes, really! ).
I would find it very useful if there were a facility for immediately navigating directly to the node which is currently showing an error condition, or to have a panel that shows all those nodes in an error state (i.e. those with a red circled cross), which allowed quick navigation directly to them.
Currently I often spend time scrolling around trying to find the point at which the error has occurred. Maybe I should just get better at writing workflows…
It would be great if there was also an option to display the full detail of all warnings and failures in the Node Monitor on the new UI. I may be missing something, but I am having to find the error node / click on it and even then I am only seeing an abbreviated text of the failure. You could make the warning / error list into nav / select links back to the associated nodes and solve both problems at once.