Um, no. Milliband was too far left for the electorate and they lost hard as a result. Why do you think that going even further left will help exactly?
The centrist candidate last time was David Milliband, the centrist candidate this time is Liz Kendall. Neither were/will be elected, even though they're the only options that would have/will make Labour tolerable to the electorate.
People voted towards the right, they would probably have tolerated something slightly more the left (i.e. actual centre), but Milliband was too far to the left to be tolerable to most people. Your solution is to swing to a leader even further away from what people wanted, really?
Gordon Brown had the same problem, he was just a little too far left to be tolerable. No one wants Brownites like Milliband, Balls, and Burnham. They want people who are willing to balance state handouts with fiscal responsibility, Corbyn is the exact opposite of that - he believes that we have infinite money that we can just use to give more and more handouts to everyone.
Good luck with that, that was exactly what lost both Brown and Milliband the election, except now you want to double down with it and do it even more, as if you believe that if you throw enough fail at something it'll become success. No, just no.