I'd say they only dropped it because of high-level pressure and adverse publicity. I wouldn't assume the same outcome with, for example, a random ozzie instructor on a diving holiday. The concerning issue, IMHO, is that such serious charges were bought at all, particularly given the absurd allegations contained therein (improper diving profile etc.). Also the fact that they didn't even inform him of their investigation or give him a chance to appear!
My view is, who's to say they won't do it again?
> Most people have no issues diving in Malta
Until they do! :-)
PS. Not trying to start an argument, just stating my view from this side of the pond :-)