I think South have appointed a hungry coach who's ready to prove himself, which is exactly what you want. A win against Avondale is huge, i honestly was expecting Avondale to just put south away easily. When i saw the results, i was shocked and quite happy that Avondale had lost.
In my opinion, it's better to take a chance on an up and coming coach rather than a very experienced coach just looking for his retirement fund.
I'll use Carlton in the 2010s as an example. They had a young and inexperienced coach
In the late 2000s/early 2010s. He managed to have them playing finals 3 years in a row. He had one down year where his team was destroyed by injuries and just narrowly missed finals. They sacked him later that year and appointed the most experienced coach, Mick Malthouse.
He managed to get them into the finals once on a technicality due to Essendon using drugs to cheat. The following years he had them playing an ultra defensive slow outdated style of play and he had killed the list by getting rid of good young players for his favourite older players. As a result the team kept finishing low and players wanted out of the club. 3 years later, he was also sacked.
He was like a cancer at the club and thanks to him, the Carlton football club had no choice but to go into a full rebuild mode where they would be finishing low on the ladder for the next decade or so.
Good on South for taking a chance on this coach, hope he does well.