I notice that we now have "Project Information" Fields available in addition to the family-specific parameters. However, there is still no way to see what view the Annotation Symbols are in!
In my case, I'm trying to clean up our detail library - there's a bunch of old/duplicate families that I want to replace. I can't just select all and change the families (because they have instance parameters that need to be kept). I'd like to just make a Note Block for each family and list what View each one is in (and/or what Sheet & Detail Number would be nice, too - but that info's in our view name as well).
Other possible uses I can imagine: if someone wanted to get counts of symbols by what Level they're on (by pulling the Associated Level of the View they're in), or filter by View Type (ignoring Symbols in Drafting Views, for example). Also, if the number of Leaders that the symbol has was available as a schedulable property, you could count how many leaders (for cases where one symbol is being used to point to an item in two places).