I commented elsewhere that the new Locate optional buttons are a helpful innovation, IF available for any arbitrary field. The hope is to let the user decide what cross-tab links are helpful.
(Because I rely on several custom fields for tagging so don't find the three bolted-in Locate fields to be helpful. I need it on Keywords and on custom field Artists and a few others.)
Even better would be to make this a view-level feature, not specified at the field definition level. In the view design dialog, for each and all view columns, provide the option to display a Locate button.
Views are usually designed to organize and work with files in specific ways, so cross-linking certain views and/or searches via a Locate button would be wonderful. But in many other views, a particular Locate button would just waste space. (I turned off the feature because I didn't want to have it show up globally.)
In some database systems, this type of cross-link does an ad-hoc search on the column field and filters the current list/view or opens a new one. But for more control, some databases let the user control where the link jumps, to a specified view that is sorted/grouped on the particular field. For instance, if a Locate Genre button was displayed, clicking might open the Genre view and jump to the first matching value.
For multi-value fields such as Keywords, the link would jump only to the first value -- it can't read minds.