To be fair the MCG wicket runs along the short axis with the long boundaries square of the wicket. Burswood just amplifies this by being narrower and longer.
Probably the major reason why the MCG is the size and shape it is, because it has a long history of catering to both footy and cricket, with a large set of members who want the best view for both. That layout pretty much achieves it for both.
At Adelaide Oval the orientation of the ground means the best seats for cricket (behind the bowlers arm) are the worst for footy (behind the goals) so they kinda ended up with duplicated facilities.