Tony, I think that you should read up more on preferential ballots. 

How does it create a two party system any more than FPTP? It is just not logical. 

As for your list of "bland" leaders helped by the preferential ballot, tell me which leader, bland or not-so-bland, who has not been elected by the preferential ballot. They virtually all have as far as I know. So to cherry pick a few "bland" leaders claiming they illustrate a weakness in the preferential ballot system is not being honest.

The ranked or preferential ballot would greatly improve our system. And it is easy and very cost effective to implement. If you are going to talk about it, then please represent it fairly and accurately.