As of title, is there any way to customize the quick settings grid available in Android 4.2 ? This feature has potential, but in most cases it does not take advantage of the screen size.
Currently I can only find customization options through mods or other updates to the ROM. For example: http://forum.xda-developers.com/showthread.php?t=1999125
It would really be great if stock Android 4.2 would provide functionality to add tiles, re-order tiles or change the function of long/short taps on tiles. This issue has some of those feature enhancement requests: http://code.google.com/p/android/issues/detail?id=40285
This can be done in Android 4.1.2 especially in Samsung Galaxy Note 2.
Settings-> Display-> Notification Panel. Then drag and adjust required combinations.
If there's still anyone interested in getting the answer, the best I know is by using Notification Toggle by j4velin. It can be customized to display toggles(Wi-Fi, Bluetooth, etc) or to launch apps.
My initial stock Quick Settings were more or less similar to the one you posted. After my favorite tweaks it looks like (see an app's icon too):
The usage is simple. You install, activate, launch this app → Statusbar tweaks → QuickSettings management and do the tweaks as per your needs.
And don't worry regarding it's description related to Mediatek devices only. It works on Qualcomm ones as well.