I called Enrich today to ask a few questions (got an agent reasonably quickly, but the line quality is always appalling -- not a skype call either).
I was ringing to ask whether I could add a stop-over by phoning in to the call centre after booking online (I saw a previous reference to this on this site) for an Australia to Europe booking. The agent said, yes, it's possible, but you would have to forfeit the 15% points discount from the online booking, as well as pay a change fee. So I guess if you want a KL stop-over on the way to Europe from Australia, you are better off waiting for the 1st of December and booking the ticket as two separate tickets, to claim a small points discount, and free stop-overs in either or both directions.
We may just go ahead and book our tickets away, as I am not that fussed on stopping in KL (of course, my boss the wife may have other ideas).