If a certain aspect worked, it was kept, if it didn't, it was canned. The result was Geometry. Genesis combines shorter chainstays with a shorter stem to provide a bike that climbs great and feels stable and confident when descending. Fisher bikes already had the shortest chainstays in the business, but with a bike that climbed better than its competition, why not push your own envelope. Shorter chainstays equal better traction.
Genesis also features longer top tubes to improve handling and prevent endos.
Longer top tubes put a rider's hands behind the front axle. You are farther behind the front wheel. This dramatically increases stability, and steering precision. Giant is the largest bicycle manufacturer in the world. Now that sounds impressive, but what does it matter if the products are so-so.