Wide seats for fatter arses is a bit of a PR con. The really important dimensions for comfort are the distance from seat centre to adjoining seat centre and corresponding distance between rows. One determines 'elbow room' and the other determines 'leg room'. The stadium was designed how long ago? It's already half built. So the centre to centre distances are fixed, decided long ago by stadium designers on the basis of data describing an idealised 'averaged sized' person, meaning the wider seats "chosen by fans" will, most likely, only result in a narrower gap between seats. Similarly, longer seats will only reduce the distance between the front edge of the seat and the back of the seat in the next row - that's the space you are expected to walk, or squeeze, through when you are trying to get to your mid-row seat, past a whole row of people already seated. We can only hope that the stadium was actually designed with plus sized Aussies in mind, and not on the basis of an out-dated ideal determined early in the past century. I think we've probably all had the experience of buying that XL sized tee shirt that, in reality, wouldn't fit the modern, healthy, 10 year old.