I'm not quite sure how much of a budget P&W has (or how much it would need to do this), but I think a mobile app would be superb for easily accessing your nation on the go with your phone (which is what I do about 87% of the time). While the browser does slightly adjust slightly on the smaller screen it doesn't necessarily make it easy to preform some actions without having to zoom in and out. It would be useful being able to get notifications with an app as well, especially during times where you're involved in a lot of wars/trading/messaging. I had something else to type but it eludes me, so (insert strong conclusion here).