The stuff that Rudkin was supposed to be doing.
Sporting Director and Director of Football are ultimately synonymous.
A sporting director should be in charge of running the footballing side of the business outside the realm of coaching the first team. So, building the squad and maintaining it first and foremost. But more than likely also building and overseeing the operational teams that directly impact the football like sports science, scouting, data analytics, etc.
Should all be his remit.