It's very difficult (impossible?) to form an accurate assessment as to whether there are any common causes in incidents involving RAAus aircraft and pilots. This is due to two main factors, firstly the lack of a functional incident recording and reporting database, secondly a reluctance to report near misses.
Any new regulations or training are only hit and miss attempts to improve safety. This may be why the safety stat's don't seem to be improving, without the full picture some measures may in fact reduce safety. I understand there is a system being created, but it cannot come too soon and must be used correctly. New rules and threats of removing privileges rarely increase safety, proper education is the only effective way. Appointing a training officer is a good move, but they must have accurate data to work with or else they'll be shooting in the dark.