He was Mazzulla’s top assistant and right hand man, the only person on our staff with that level of experience. Basically, since the summer we’ve lost two of our three coaches with high level experience and moved up the least experienced one to head coach. None of this purposely but that’s how it’s played out.
As far as specifics I’d imagine as a long-time NBA point guard he’s working with the guards more than anything.
Edit: Remember that aside from Mazzulla, every assistant coach was an Udoka guy, including the next two on the totem poll in Aaron Miles and Ben Sullivan. Expect a full overhaul in the offseason as these guys move on and up elsewhere (very likely wherever Ime lands).