The current "light bulb" icons don't represent processes that have just finished nor a failed process. The lines should also have greater separation.
I've already made local changes replacing the "light bulb" (information) icons with "gears" (preferences) and think it looks fantastic. I also changed:
add(IzPanelLayout.createParagraphGap());
to
add(IzPanelLayout.createVerticalStrut(5));
Additionally, I changed the failed icon from the light bulb to a red X (stop) icon, but don't know how to fail the installer to test what it looks like.
Also added a vertical strut instead of paragraph gap to provide better spacing.
add(IzPanelLayout.createVerticalStrut(5));
//add(IzPanelLayout.createParagraphGap());