EXP just isn't enough status for QF to do this. Most of the ASP J seats sell as J (hence the lack of award inventory) and often at the last minute (particularly at this time of the year!). They might do it for you if you were CL but not for an EXP (or for another route). In any case it is a short flight and the view is worth far more than the J service ... I'd rather have a window seat in Y than an aisle seat in J for this trip (also I'd pick a 146 for their better flight profile).