Claudio Braga admits Hearts are finding it difficult to adapt amid a huge summer of change. New head coach Wouter Vrancken's reign has begun with Champions League elimination as Hearts were thumped 6-0 by Sturm Graz in the second qualifying round. The Belgian is striving to implement a new style of play, while key players Lawrence Shankland and Cammy Devlin have followed boss Derek McInnes in moving to Rangers after last season's agonising title near miss.