It also breaks the look and feel from the Launcher pop-up.
I don't really understand what you mean by that.
Now the Launcher "tool-tip" is only a list of text items (when you hover, right click)
IMHO, there is nothing easier to scan and search than text in a vertical layout.
Maybe it would be nice to raise the window when you hover an item in the list, so you get the best of both.
You mean to display a list of titles when you use alt+bat and only display a preview of the selected document? That might be nice.
I was referring to my mock-up when you mouse over an item the corresponding window is raised.
In the Alt+Bat it would be nice if the title was showed in each windows preview, it wouldn't look as nice but it would be a lot more useful than only having the title of the selected window.