With a big document it can take so long to find things nested within layer groups, often you need to scroll forever. I often have more than 500 layers in a document
It would be great to be able to put in bookmarks which would also be acessable via shortcuts to jump around the layer panel. These could be added next to the layer search bar, see attached

Further more dragging a layer or group over the bookmark at the top would place this layer just above (or below if alt is held)
Further to this it would be great if we could split the view of the layer panel into 2 so if there is 2 sections of a document that need work you could keep each part visible. Obviously it would also be great to be able to drag layers between these sub panels if needed.