Lexus has traditionally been afraid of having multiple packages. Japanese carmakers don't go for niche marketing, if it wont appeal to everyone they won't do it. It looks like thats starting to change though. The new IS is supposed to have all kinds of packages, a coupe and even a convertible and there is talk that the LS will to, the LS430 being the base model moving up to a high performance hybrid version with V12 performance with a sporty S55ish car somewhere in between.
As for the styling, you should know by now not to trust spy drawings, Lexus is VERY tight lipped about styling and we wont see anything that looks like the new LS until they want us to, sometime early next year. I personally love the style of the new GS and think the Lexuses in the model line now are starting to look a little dated next to designs from BMW, Cadillac, even Infiniti and Acura. The new LS will be awesome, just wait and see.
And if its not I'll buy an 06 LS430 and keep it until the wheels fall off ;)