Regarding the question of whether there should be an offence of 'causing death by dangerous flying', I seem to recall this being raised after the acquittal in 1996 of the Hercules pilot who had been charged with the manslaughter of a soldier hit whilst standing on the roof of a truck during a low flyby after a practice drop at South Cerney.
Yes, the offence of causing death by dangerous driving was introduced because it was so rarely possible to prove such a level of negligence as to make out a manslaughter charge in fatal RTAs. I'm sure a corresponding offence could be created for aviation (and perhaps other forms of transport) but it would be a case of finding parliamentary time and will.