Has Star Wars Smart Play flopped?

I think we can guess the answer to that already, but empirical evidence now backs our theory up. Amazon.co.uk has slowly been dropping the prices of the sets pretty much from day one, and now some of them are almost 50% off, just three months after their launch. For example, the price of 75422 Yoda's Hut and Jedi Training has been slashed from £59.99 to £30.83, and 75420 Luke's Landspeeder from £34.99 to £20.40. These are sets that are not 'smart' at all until you've spent at least another...