I think Calde still has plenty more first-team football left in him yet for this all to be a moot point - by the time he's ready to hang up his boots we'll probably have another manager anyway.
How can anyone on here have any idea as to the Assistant Coaching abilities of Nathan Jones? Unless you see the guy in training it's all speculation.
Playing Devil's Advocate, you could just as easily come to the conclusion he's a brilliant coach because one of our best players this season...