AFAIK the investigation is still on going which is why there hasn't been anything officially released. I personally think it's more an issue of potentially not being able to see vs running out of track and pitching the car to the side to keep from going out of bounds. The car only went 168 I think which isn't incredibly fast so it wasn't like he was running out of shut down area. AFAIK the 'chute didn't fully deploy although it was pulled by the driver (again, only AFAIK, could be wrong). The rules are absolutely not forcing anyone to force their car into a position where they no longer have control and are putting people in danger. Those that do that are doing so completely by their choice. The smarter and possibly safer thing to do is to go out the back and hopefully get stopped within the buffer zone.
As far as the turn out goes, nothing says that you have to make a 180 deg turn. All they care is that you clear the course in a fairly efficient manner.
I will say that after not driving at El Mirage for some years and now driving a car that has those ISP-style lateral head pads in the cage, it's a helluva lot harder to see over to the return road as I'm coming off the course. I had to squish myself down to see under the pads to make sure I wasn't going to run into anyone as I turned out.
