He admits it was a conundrum for him why Levitt was playing for his country, but couldn't get a sustained run in the Addicks side.
"Is he going back better than he came? I think yeah. There's stuff he has taken on board that I've passed on to him and he said himself 'I feel I'm learning here'. He enjoyed it here.
“He is very good on the ball, a very good passer. Was it a little too early for him? I'd probably say it's the league that was the problem – not him as a player.
"It was just the physicality of the league. Other leagues aren't like that – the Premier League and international football.
“I've asked myself the question 'why are you not playing him?' We brought in Ben Watson, who has all the experience in the world, which made it difficult for him. Ben was playing well.
“I see Dylan in training every day and he is a good passer. I've asked myself why he can play for Wales but can't get in our side? Those are the questions I ask myself. My answer is international football is completely different to League One.
"International football is you have it, we have it, you have it, we have – it's not a physical battle with balls going back to front over your head.
"League One is competing and fighting, you don't get that in international football. It's a prettier game, international football. That's what I've said to him."