Agree with the above. The w-bodies had their time, and the market has changed since that architecture was even developed. Now that the W-body is aged, any redesign on it is like taking an 80 year old woman, giving her a facelift, and setting her on the street corner for pleasures of the flesh I used to be a big fan of the w-body Grand Prix in the late 80s and most of the 90's, with my favorite being the 97-2003 models, GTP sedan, black, 1SD package with the HUD, leather, and all the goodies.
I applaud GM for combing their global operations. I think its an efficient way to get products to a number of different countries. I like Holdens. I like that Holden has been making large, rear wheel drive, V-8 powered midsize, large, and utes for years. To me, they had a better idea of traditional American cars than American car makers who abandoned that market because the carmakers believed that the front wheel drive car was the future. Now that the market is changing again and rear wheel drive is considered premium for its handling and infinite power cieling, automakers are coming back with their larger cars being rear wheel drive. I know things will never be the way they were, and while I miss some of the things that older cars had (bench seat options for example), I am only one customer and a car maker cannot make decisions based on one or two customers wants and/or needs. If GM can bring Zeta based vehicles to the U.S. that are competitive and that the market demands, then I think they should do it. It's a good way to fully use the company's global resources and increase global sales.