FFF - the problem is that whilst you are right in a simplistic way - the issues at Sumburgh were probably not directly related to the fidelity of the L2 Sim - the reality is that when faced with a simulator which has a lot of faults in the way it behaves, and/or crashes (software wise) fairly often, the instuctor's job becomes very difficult and the faults / discrepancies create a barrier to learning even when the subject being taught doesn't specifically relate to them.
On the relevance of this thread, you are right however as the latest in the sequence of N Sea accidents we are taking the opportunity to look beyond the specifics of this accident.