Search Function in the Layer's Panel
To add to "Inline search filter for all styles panels and swatches", not just list of styles but list of objects within the layer panel. Like Photoshop's layer search.
I use Photoshop quite a bit and found that the search function within the layers panel very helpful when I have MANY layers and I need to find a certain item (see image below). Well, with InDesign, I might have only one layer but TONS of objects in each. So a search function would be incredibly helpful in finding that object.