I doubt in Jan, but possibly in the summer depen?ding on how far / if SFC fall in the interim
Hopefully it doesnt affect the squad at all, but it would be pretty incredible if it didnt
Not really sure why, Cortese's changes won't disappear when he's gone, they won't go and throw the spare mattresses in the nearest dump because he left. He didn't take coaching sessions nor chose the team. Future improvements, things he had planned may not happen, some will, the training ground improvements won't be thrown away, again they add value to the club. Unless the owner is a bat **** crazy woman intent on getting revenge on an evil fathers favourite possession or something, she wants to sell and maintaining the value of the club gets her more money.
As I said with the manager, Cortese may be the reason he joined, but that doesn't make it a reason for him to leave, as no other managerial job will involved Cortese(currently). I can see short term changes being, lack of investment where Cortese might see it as securing/improving the club and an owner looking to sell merely see's it as money that won't directly add value to the club and thus reduces the effective profit of selling as the club is now.
Where that might hurt them worst is contract renewals and potentially losing players who want a new contract but she's unwilling to give them a improved contract.
As it stands Cortese leaves the club in a FAR stronger state thanks to many changes he has made, the direction he took with the club, the manager/players he helped bring in. Not much if anything gets worse with him leaving, the only thing they lose is potential future improvements he had planned.