They finally fixed the Battle Log app on the Nexus 7. It's now formatted correctly to fit the high resolution screen. However, I still think it's too small of a screen to see the map on. I prefer my laptop.

FYI - if you log into battlelog on a 2nd computer (or the app) when you join a game the blue bar will pop up at the bottom. Click battle screen and you see a real-time map of the game. It's actually quite useful.