That's stretching it a little although it was his best game for us imo. Overall, I think he's very average and as Windsor suggests, I'd give Kakay a chance ahead of him (and Angel.....and Ball.......and BOS if playing three at the back). Last night he was simply awful and often seems to suffer from a brain freeze and just kicks the ball off the pitch. Bob could probably tell us that this is a well known flaw in some players, in that they struggle to consistently do the simple things well. Manning was equally as bad last night imo and simply isn't a left back. He also gives the ball away at an alarming rate.
Both Manning and Kane are better as wing backs as you suggest. Wonder if we will switch to three at the back again when Barbet is back. Hall, Masterson and Barbet would be interesting to see.
That's exactly what I suggested a while back. I'd try BOS as the right wing back too as I think he's tailor made for that position, plus it would be a struggle to get him into the side in a 3-5-2.