The live app only works at the official rounds, where seven is the broadcaster. At the Australian Grand Prix, however, One is the broadcaster of everything counting to it, also one reason among others why it isn't a points race.
Disappointing that Davison kept doing the same thing under braking, just cannot drive into other people's lines like that I was expecting that eventually he'd tap himself wide off of Lowndes' car, but meh..
Afaik the rear is light and has quite a high roll centre due to the type of rear suspension used, and to get the cars to turn while using a live axle. I don't think they roll over that often, to be honest.