From the review in the magazine, it seems that the presentations/graphics are top notch but other than that, the game is deemed to be let down by the 'shortness and repetitiveness'. After all the previews in the onm magazines running up to this, seeming to praise it and all, the score (and i know it's only an individuals opinion) seems a little unexpected and low.
The lack of many worlds is disappointing but I'm still looking forward to it though, especially as it's my first Mickey Mouse game and rescuing characters and upgrading their rooms in the hub sound great. Hopefully, it will be in the post tomorrow and tide me over til the Wii U as next week is going to drag so badly.
A little off topic, but the game sort of reminds me of Halo 4 in whereas for me, the campaign didn't really thrill me, yet the graphics were phenomenal and kept me playing and feel it may be similar for me in the case of The Power of Illusion.