If you are relying on your two deep safety for run stop support then your running defense has bigger problems. Henry was going untouched for 5-7 yards a pop. That isnt because of safety play.
As for the thread... yeah Cam Lewis has been the bigger problem. I said before the Ravens game, in that "besides Josh Allen who has a big game" thread that Cam Lewis would have to have a big game if we are going to stop the Ravens offense. He didn't and we didnt.