Currently, you search for work items, select one or more complete, which loads a separate page. When done or if you want to alter your "custom queue", you have to go back to the Advanced Work Queue and adjust, then repeat. How about instead, we provide something similar to online shopping sites where you hover over the item (or select a quick view) and it opens the work item viewer page in a popout window (similar to our context help for example). This can provide the user the ability to observe more information about the work item.
Alternatively, a docking concept where the work item viewer could be docked to the right and allowed to be hidden/shown, similar to how ScienceSoft is working the new application Search page.