In KDE4 Kickoff has the ability to resize (by catching the corner with a mouse and resize). It is very useful. Please bring it to Plasma 5.
As you can see when fonts are bigger some names don't fit: "Applicatio" . Besides when I have plenty of space on monitor I don't want to be forced to scroll. Resizing really is useful because it makes it easier to use Kickoff and make it quicker to start an application.
*** This bug has been marked as a duplicate of bug 332512 ***