Warnock was Cardiff boss between 2016 and 2019, clinching a record eighth promotion as a manager when he guided the club to the Premier League for the first time in 2018.
That was the last league success at Cardiff, now in League One, but the veteran manager believes Barry-Murphy can clinch the first promotion since he was in charge.
“I’ve never enjoyed watching a Cardiff team as much since I left,” said Warnock.
“Brian is doing a great job, they’re like a breath of fresh air.
“They shouldn’t have gone down last year with the players that they had, they should never have gone down when I look at it.
“I would have kept Joe Ralls because as the season goes on with all the games it’s good to have an old head in there.
“But other than that they’ve brought in well, they entertain, the fans get behind them and they’re only young.”
