- Edited
I don't have a full list of suggestions now but I'll add them as I think of any.
- To start with, I think we can make Dolphin less fearsome: we can remove the zoom slider at the bottom and the "Recent" section. If you really think the "Recent" section is useful, at least remove the "Search for" one, it's very easy to replicate its functionality by using the magnifier icon at the top right (if you're using the new Dolphin default layout).
- We can use the Icons-only task manager in the panel, but IIRC KDE itself is going to use it by default. It's better to check it first.
- Change the ALT+TAB behavior to make applications appear in the center of the screen. I don't like them appearing to the left.
- Remove the "?" button in Title Bar.