I'm not sure about a side-by-side view, or folders for open applications (although folders for the launcher would be good), but it would be nice if we could control the layout of the multi-tasking view.

Obviously I haven't tried it yet, but I'm not sure I like the idea that the most recent app moves into the top-left, so it would be nice if that was optional. It would also be nice if we could rearrange the running apps in the grid (I've often wanted to do this in Maemo).

Of course, the Harmattan home screens aren't open source, so this won't be something we can fix anyway (other than making a clone).