So we most-definately will see improvements in Trials Fusion on Xbox One and PC after DirectX 12 release from Microsoft.
Full and Original article: http://www.eurogamer.net/articles/digitalfoundry-2014-trials-fusion-tech-interview
Short article: http://www.gamepur.com/news/14489-directx-12-boost-xbox-one-performance-and-makes-porting-code-maintenance-ea.html