Do you realize that technically, there are no extra commercial breaks, and that it's just the break between shows that's been moved into the actually show? It's designed to streamline the viewing of both H&A and Neighbours, so people can jump from one show to the next without any commercial interruption.
Of course, it's pointless, b/c the vast majority of Neighbours viewers don't watch H&A, so they aren't going to be tuning into the First Look and carrying on into Neighbours.
This system has been in play for over a year now, so it's not like it effects ratings, considering the ratings are slightly down due to the better weather/return to school/uni/etc. They'll increase when it gets colder, and people realize that Neighbours has improved.