Tony Mowbray was pleased to see his side survive a scare to reach the FA Cup second round, but admitted there's plenty of room for improvement following Saturday's game.
Rovers came from behind to beat Barnet 3-1 at Ewood Park, courtesy of second-half goals from Joe Nuttall, Danny Graham and Marcus Antonsson.
Speaking after the game, Mowbray admits his side were lacking in the first half, but says the most important thing was "getting over the line".
“I felt let down at half-time, to be honest," said the boss. "I’d given a few of them a chance to show that we need a full squad and it obviously wasn’t good enough in the first half.
“The intensity, making the right pass and the right decision – it just wasn’t there.
“Sometimes footballers feel they’re ready, but they need to be at much higher levels than they were in the first half. But cup competitions are about getting over the line and into the next round and we did that.
“There weren’t too many positives other than having three strikers scoring goals. It’s great for Joe to score again, Danny worked hard and got his reward, but it was a frustrating day, not one I enjoyed."
Asked what he said to his players at the break, Mowbray added: “It was a difficult half-time, it was more about trying to kick-start us really.
“I don’t want to say what was said at half-time and full-time, but we got a reaction and got the job done in the end.
“If you think you’re good enough to play in the Premier League or at the top of the Championship, you have to be the best player.
“You’re playing Barnet, with all respect to them. They’re fourth bottom of League Two, so you have to set your own standards really.
“You have to play with your heart and soul. You can’t afford to take it easy and that’s the sort of chat I had with them.
“You have to look at yourselves, you have to put your head on your pillow at night and say ‘did I give enough today?’"