Even when the ball was into feet he sometimes held it up to long, or tried to beat that extra man when there were guys racing into support. Having said that, some of his finishing was sublime - that volley pre season against St Johnstone and the little roll past the keeper against Dumbarton, first game of the season......
But yeah, Vaughan in that number ten role opens up a lot of space in front of Stewart, who's decent at playing off the shoulder of the last defender.