Personally, I am more against him joining Cas if that's in the pipeline. Too much of a risk and it doesn't sound like he's changed his lifestyle or his pals.
That said, i do see the lure in getting him back to the Zak of 2015, I'm just unsure about him, very close to his roots. It's not about the coaching and advice on hand anymore it's about him.
Personally I think he stays at leeds ...