I just upgraded to 3.4.2 from 3.3.2 and noticed that I no longer have the ability to dock the Quick Access Toolbar below the ribbon. I found it very helpful to have the QAT below the ribbon, since it minimized mouse travel and allowed for the display of about twice as many commands in the QAT as it does when it's above the ribbon. Now that the QAT is above the ribbon permanently and sharing real estate with the project name and command search bar, half of my command icons are in an overflow menu so it takes two clicks to access them, which seems to defeat the purpose of a 'quick access' toolbar.
Please bring this functionality back! Having the QAT directly above the Map View instead of above the ribbon was extremely useful.