What are the statistics on passenger survivability?
Aside from a well known CFIT, name me a significant injury or fatality in a Jabiru?
I'm not defending them directly, I'm just stating the obvious.
I know a chap that smacked into a power line at VNE during a beat up. Lost the end of his finger and ruptured his eye socket, but he's fine and the aircraft is flying again!
Lowering the windscreen or making the forward parts transparent would be good but you couldn't do it without significant modification which means it would no longer be a bolt on kit.