I thought this was going to happen as well. Losing two teammates like Panarin and Miller can have an effect on the locker room, but that led to Kreider and Zibby stepping up.
As for Igor, he's good with the stick, which can be used for deep passes across the ice. He might not be the one that can steal you a game, considering he can give up some bad goals (similar to Hank), but we'll see what happens.
It also wasn't Igor's fault that we're taking terrible penalties, thus hampering our offensive upside, and are prone to giving up to give up prime scoring chances.