LEXUS says it has changed. While virtues like quality, reliability, unparalleled owner satisfaction, customer care, refinement and luxury remain, every model beginning with the all-new fourth-generation GS just released in Australia will add driving excitement to the mix, while the BMW 5 Series competitor also rights its predecessor’s wrongs with a roomier cabin and larger boot. We’ve always liked the GS in any case, and the styling is certainly different, but we wonder if the Japanese have achieved their objectives with the latest iteration.