I am known for being a practical person and in fact I have sometimes been criticised for being that way. Call me old fashioned but I don't really care about that.
On a simply pragmatic level there is no good argument for having an AV system that not many people will understand imposed on us. The evidence is also there to support those who think it will not work. Fiji, Papua New Guinea and Australia are the only 3 countries using the system right now so it would appear that if it was so good other states would use it.
Keep the current system as it stands!