The Manchester United star impressed during the 1-0 friendly defeat of Rodez and showed his potential.
Miller proved a key figure and, other than Danny Pugh's match-winning goal, he provided the magical moment of the night when he skipped past four Rodez defenders to burst clear and was only denied by the hosts' goalkeeper.
Kevin Blackwell thinks he can only get better as he gets used to the pace of the Championship. "He's still got to get to the pace of the game yet," said the Whites manager in the Yorkshire Evening Post. "Liam hasn't had too many first team games and he needs to be playing consistently. If he had rounded that run off with a goal, it would have been sublime, but I want him to be positive and get at people."
Miller's style is reminiscent of former Elland Road favourite Lee Bowyer and Blackwell agrees there are similarities. "He is similar in some respects," admitted Blackwell. "He's box-to-box, he likes a tackle and if he get into the last third un-noticed it'll be interesting to see how he does.
"I knew he wasn't playing regularly at Manchester United and it's about getting as many games as he can while he is here."
Miller's individual performance last night was the highlight against their French opponents. Blackwell kept his promise about resting the majority of his senior players and opted to give his squad men the opportunity in testing conditions.
Rodez made full use of their allowance of substitutions, but Blackwell kept the same 11 on the pitch for the full game. Pugh's goal settled the clash and the Leeds boss said he was pleased with the work out. "It was very windy, but it was a useful work out for lads who haven't had games," he said. "They used two full teams, but we didn't make any changes. It was an opportunity to look at players for me.
"Nick Gray's contract is up at Christmas and I've got to make a decision on that. I wanted him to play a competitive game and this was a good chance. Rui Marques had an opportunity, Danny Pugh did well and Gylfi Einarsson played his first game after serving suspension so it was a good exercise for us."