Firstly very nice looking app, I feel it wouldnt suit my style of gameplay as I'm a casual FPS style gamer, I'm not in any clans at the moment so I don't really need to strategize the way I play. Like Kornman said if you can approach Steam and tap into their competitive gamer group you'd be onto a windfall.
I am a sort of app developer too, and I was wondering how many people are in the GamePlan team (or is it just you as sole developer)?
May I suggest you put more screenshots onto your website? The app is heavily visual based, the major feature is you draw on the map, use the icons etc. I really feel you want to be jamming that down the users throat by having a large set of screenshots showcasing the app. The video you have is very nice but sometimes a set of screenshots will do wonders alongside it.
I'e noticed a typo-ish error on your website by the way:
A. You must have the edit menu open to make changes to your drawing layer. If the menu is closed you are in view mode, so you can more easily pan the map with single finger and zoom with pinch.
You've cut off the question.