I agree that location is the reason BLT costs more to buy and more to reserve a villa. It's proximity to Magic Kingdom and the Contemporary Resort affect it's price.
A lot of
DVC members that own at AKV love the value rooms as they are much cheaper than several of the other DVC resorts. However, those rooms really are much smaller. Here's the square footages:
2 Bedroom
AKV Kidani - 1173
Jambo - 1075
Value - 945
1 Bedroom
AKV Kidani - 807
Jambo - 710
Value - 629
Studio
AKV Kidani - 366
Jambo - 365
Value - 316
Kidani Village is a DVC resort, whereas Jambo House is a regular Disney Resort that converted some of it's regular rooms into DVC villas. All of the value villas are only located in Jambo House and are located on the 5th floor. All of the 1 and 2 BR villas at Kidani have two bathrooms. The Master bathroom at Kidani has a separate jacuzzi tub and shower like the other DVC villas.