Personally I don't like the follow-on. If it backfires, your bowlers are wrecked, your batsmen are more tired than they should be and you have to bat last. There are lots of great reasons to bowl last, one of them plays for Australia. I don't see the point of these sacrifices just to get a day off.
Obviously, in this situation they were more than a very good total in front, but just look at these guys showing England that it hasn't changed too much from day 1. You can still bat on it, it's not some sort of Gabba voodoo. It's a great pitch offering rewards for any player who plays well. It's just not carrying anyone who doesn't.
The situation has actually brought up conflicting arguments. Some say this increases the chance of a draw, while some say the game should have been over by tomorrow morning. If people can accept that England might be capable of batting out six sessions on a wearing and cracking pitch to form a draw, then surely they can accept that they can bat six sessions on a less aged pitch against a team that's already been in the field for two.