Don't hate it till you see it
It has already been tried in the VFL about 100 years ago. It was considered a failure as it made the game too simple, and not enough diversity on strategies to get out of your defensive area. They shortened the goal square because the long square led to dull, booming kicks up the middle all the time. Not interesting.
Imagine how crap games at the short grounds will become? You have your longest kicker thump it 70m up the middle, to a pack. Awesome.