All things considered, the VAG A4 chassis and the Ford Focus MKI chassis are about the same age (released in the same 1998/1999 window), and thusly have displayed greatly different outlooks on life. While the A4 chassis continues on in various Seat and Skoda products, along with the VW New Beetle, it would feel as though the chassis still has plenty of life to it, offering a solid ride and performance trade off at a pretty reasonable price. Certainly the A5 chassis overshadows it in almost every way conceivable, but then again, it is much the same story over at Ford.
Taking the gamble on "value" as Ford North America seems to have done comes off as risky in my mind. The reluctance to improve a strong-seller only sets the car up for an eventual failure, as they will only cater to the hardcore fans, and that gets you nowhere. You would think that Ford would take a page out of the GM J-Body page (aka Cavalier and whatnot) and realize that you can't drag a platform out too long despite the various updates given to it.
...With the Japanese stranglehold on the small-car segment, Ford needs to work a bit harder on their small-car lineup. Granted, GM and DCX seem to have done something about it (DCX, not so good?), and the Europeans will always do their "thing" (IMO, better than what the Japanese do), but it still doesn't give Ford an excuse to only update what we already have. If this is their "Way Forward" plan in action, it appears as though it will only set us up for disappointment.