The reason we are seeing so many rebadged Daewoo's is purely excellent marketing from Holden.
Without stereotyping - cars like the Barina, Vectra, Viva etc are chicks cars. Face it, chicks prefer them, blokes prefer Commodores.
Another general statement which rings true in most circumstances - blokes care about the performance of their car, and not just the 0-100km/h time. Chicks don't - they care about the look, whether it has A/C, if it has a CD player, where the mirrors are, and the colour.
Holden is now able to offer chicks all the things they need / want in a car, without having to pay extra for a German engineered Barina, which while offering better performance, is practically useless as the target market simply doesn't care about German handling and performance
while you and me can see that the new cars are inferior to the old, the target market either don't see or simply don't care. Therefore Holden can continue selling what appears to be the same product, but at a much better profit.
However for the people who know something about cars, they have to provide australian / german / american built commodores, with more powerful engines, better suspension and quicker gearboxes, which is the VE Commodore