check out the new position_broadcast_smart feature that will broadcast more often based on movement, this should produce similar results to your GPS modifications.
for the power behavior, check is_low_power and is_always_powered settings for reference, you could add something like “is_vehicle_powered” or “is_ignition_powered”.
as for the roll over, maybe a more generic “panic/emergency alert” could be created with different ways to trigger it.