In fact it has a franchise structure that makes it all but impossible to reunite, because the clubs that comprise the APL would have to vote their own organisation out of existence and write off their licence fee purchase.
That will not happen. The only way to reform the present exclusionist model is for the A League to go out of business.
However, I would add, Mono, that the derogation of the A League by those from the pre A League model, the one I grew up watching and playing in and loved (and still do), is neither realistic nor helpful. The A League clubs (excluding the recent debacles of WU and Macarthur) have been around for 20 years now and have valid, if short, traditions, and, for the most part, support that significantly exceeds on a regular basis that of the traditional clubs. This must be acknowledged and respected.
The core problem is that there isn't enough money, as surely every sane person must have known, for a genuine national second division, and it is impossible to see the money ever being there. The gap in income and exposure between football and NRL and AFL is now gargantuan and we are falling further behind with every TV deal. The tie-in between those competitions and media ownership has proven insurmountable.