It's unclear how to restart incremental search for files/folders in Dolphin. If I have two folders "projects" and "Downloads" and type in "d-o-w", then "p-r-o", then again "d-o-w" and so on, the incremental search stops working at some point and it's unclear why. A possible improvement would be to display in the statusbar what characters you have entered so far and clarify to the user what the Esc key does in Dolphin.
Seems reasonable.