Yep that was my understanding of the problem with it, but surely even an ordinary rectangular stadium would be better than it just going to waste? Not being from South Australia I wouldn't know, but it seems like just playing SANFL games there is a bit of a waste
you cant just move bits around to make a rectangle. it would require knocking down the whole thing and starting from scratch.
they have a rectangular stadium in adelaide, it they feel the need to add capacity it can be done there. significantly cheaper than starting again at AAMI or if they want to start again, somewhere that's not close to anywhere else will be a better option.
also AAMI is getting on and would need a lot of maintenance to keep it habitable, easier and cheaper to just knock it down. it's going the way of Waverely. The Crows will train there, people will live on the rest of it and everyone plays at AO.