Yes, that wicket of Klassen changed everything. I was expecting proteas to make 240-260. That would have been competitive total, but Bavuma failed and everything got messed up after that.
I still believe 1999, 2003 was not Australia's victory. They were dominant till 2010, but not invincibles.
99 was South Africa's WC for sure.
2003 I don't know really, dropping Agarkar and Laxman was biggest ever mistake I believe. Picking up Mongia was even bigger mistake.