The show jumped the shark for me (I think that phrase has also jumped the shark, but I did just use it twice) when they started having puzzles such as the category "things" while the puzzle was "television and a danish".
As for shopping--it wasn't working, people wanted more puzzles in a show, so it was dropped.
As far as current editing, I would be happy to see one less puzzle per show for the ability to have a better play at home experience.
When they had more time, you would see the puzzle on the screen for longer periods of time, now it flashes on and off the screen very quickly. You can hear how bad the editing is when the wheel is spinning at full speed and suddenly is stopped.
When it comes to the game itself, I think the prize puzzle should be dropped. The game is WHEEL of Fortune, not Solve Puzzle #3 of Fortune. It almost begs a study to determine if the person who solves puzzle #3 wins the game because of that automatic bonus, and if that person does, it brings up the idea to see who solves any puzzle the most--the person who spins 1st, 2nd or 3rd. If it's anything but 3rd, it sure gives credence to the strategy to not solve the 2nd tossup, giving yourself a better shot at solving the prize puzzle. Prizes are fine, IF they are won by spinning the wheel, not just happening to solve puzzle #3.