Pirut should have a queue tab, like the Yum Extender has. Currently, it's very hard to get an overview of which packages are selected. You would have to review the whole list in the "browse" tab. The problem is that the selected packages appear scattered there. It would be useful to have a view that only showed selected packages, all together.
You get a quick summary when you hit apply. Adding another tab is just making the UI more cluttered