Starclass is more like a Premium Economy. It is the same seats as used on QF domestic Business Class. When you see Business Class on every other airline (not nessicarily travel in it) you will realise that Starclass is not Business Class. One thing I dislike about JQ advertising, is when they advertise that you can go Business Class for the price of an Economy fare.
I've been to BKK a few times on JQ in Starclass and travelled home in QF Business. While Starclass service and so on was good and it did beat being in economy, I don't think I would pay the full price for it. And unless I had a stack of cash I wouldn't pay to fly Business on any airline, as the cost of the fare would most likely cover the cost of most trips.
I'm a QF employee, but in regards to JQ I try to keep an open mind.