Indeed, no doubt Jack lacks the maturity of Ramsey, and probably some of the smart self-awareness as well. Rambo gets slated for being interviewistically dull, but he is giving the textbook, non-answers of a seasoned sports pro. Speak in generalisations, remain non-committal, and never ever say anything controversial.
On the other hand, Jack's propensity to wear his heart on his sleeve probably means he'll get a lot more leeway from supporters.
There's a lot of goodwill toward him and the desire to see him do well. He'll be given every chance, and he's never lacked for determination. The hardest fight he'll have is with the flaws in his own character which apparently Ramsey didn't have.