Lewin did post a response in the thread after a load of people weighed in following my original comments. To their credit they pointed out that they'd listened to previous criticism (also me among others) about forcing people on to their Australian site and had allowed people back on the UK site. So their rationale was that you had the choice to pay their inflated Myer and Oz website prices and get supposed benefits in 'special deals for the Australian market' or continue to shop on the UK site. I gave them credit in a response for indeed listening previously and said being able to buy from the UK site was all that I really cared about, and their 'local' pricing simply made those avenues irrelevant to me.
So overall I think they handled the criticism much better than JCrew have so far. They certainly never deleted my comments and they did explicitly respond to the criticism on the thread and attempt a justification. And as I say it now appears that some things at least are as cheap as or cheaper than the UK from their Oz site.