It would be really useful to be able to trace from a XAML file, all places within the same project that that xaml is used, so that when you make a change to one xaml, you can assess the possible impact of it more easily.
This could either be in the form of a table with all instances of that workflow, or ‘go to next/prev’ buttons to cycle through the instances.
Similarly for Variables, it would really help when changing a variable type or name to be able to see all points that call that variable.
The Universal search tool comes close, but falls short where an object has a general name (e.g. ‘Process’)