Firstly, if he is indeed diagnosed as being 'on the spectrum' then he is high-functioning Asperger's imo - he is able to maintain paid employment, lives independently and has social relationships with others (as evidenced by the charming TO et al.....).
He is not living in an alternate internal universe, such as the autistic adults I have had dealings with - they have been unable to communicate or maintain eye contact, have rocked their bodies constantly and had specific, repetitive speech patterns......that is not Tostee.
So for me, if he is diagnosed on the spectrum, I don't see it as a mitigating factor that somehow excuses his behaviour......this is not a man living outside of society.
And the clincher is that, as soon as a woman fell to her death from his balcony he RANG HIS LAWYER!!!
That is someone who knows right from wrong, who understands that he will be needing a lawyer as a crime has been committed.
Most people, if a person fell from their balcony, would be beside themselves and run down to the body ASAP, calling 000 as they went.....
His post-fall behaviours suggest to me that any diagnosis is beside the point. He knew right from wrong - he is not therefore legally 'insane'. He was, in fact, extremely calculating in his self-preservation.
So for me personally, any diagnosis is a moot point.