The app seems quite quick-to-respond and to-the-point. I like that. However, I'd appreciate a few additional small features.
For example, a Mag feeder time. I believe that Mags get hungry every three minutes like clockwork. So just have a "fed Mag" button which starts a 3 minute timer. When the timer is over, the app "beeps" or plays an animation. It would make the app more useful while playing PSO.
Speaking of which, how about a feature that shows the time in Swatch Internet Time like PSO already does? It might help in synchronizing players to join the servers or to meet in a lobby or map location at a certain time.
Of course, keeping the app as it is does provide a simpler app that's easy to understand, so either way is good to me!