Ha. Your assuming that DIRECTV app is broken based on it not working with a jb device? DIRECTV has always said they will work hard to make their app not work with jb devices because of copyright issues. And they are smart, so I have to wonder if one day they won't figure out how to make their app never work again on a jb device.
As far as JB devices using this APP, It is a losing battle. There will always be a workaround.
For the APP itself, The APP does have issues they need to address. xCon developers discovered the glitch already. Direct does need to fix it. It has nothing to do with JB devices. There is an error in the programming.