Quantum of Solace and SPECTRE both suffer from an excess of locations. A brooding travelogue interspersed by thinly justified set-pieces does not make for a compelling narrative, no matter how you dress it up. One of the things Casino Royale's second act and Skyfall effectively established was a sense of place. Keeping Bond fixed to Montenegro and the Far East/Britain let the story unfold naturally and allowed the locations to develop their own character on screen. Travelling by rote from A, to B to C, every 15 minutes in search of a MacGuffin is not only dull but it also wastes the astronomical resources the production has spent on securing and filming in these countries.
For Bond 25, the writers should focus on a strong hook and from that let a simple story grow, encompassing a minimum of mileage and a couple of distinctive locales.