I think he's our best CB by far despite his young age. He's quick, good on the ball, and can pass the football. Very few CBs are WC at 21yo, but I still think his current level of play is more than good enough.
He actually looks even better when compared to the right CB option. Fofana is a good player, but once again struggling with a hammy injury; it might be an issue with his build and something that will follow him for a while yet. Tosin is decent on the ball, but seems to be too slow for this level from what I've seen so far.
Disasi can obviously only (barely) work in a low block system like you can find in Italy, so really did not understand that signing.
All that trying to say that Colwill is the only CB we've got.