When you click the time/date in the Shell panel, it'd be kinda neat if the popdown showed the times you have configured in GNOME Clocks. It has a link to *launch* GNOME Clocks, but that seems like an unnecessary extra step in most cases. If I have a reasonable number of clocks set up in GNOME Clocks, it'd be kinda neat if they just showed up somewhere in the popdown so I can see world times with one click. It'd be similar to the way it handles the calendar - it has a link to launch Calendar, but it also shows a little calendar so if you just want to see your events, you don't have to launch another app.