Yeah I can definitely see this as a problem. But then again, when I look at how many fireballs to kill Strahd I can see why 5e did this. If we use 2e numbers, you could use a wizard/fighter and kill him in a round. Maybe this makes combat a tad too quick and there wasn't much to it? I never played 2e so I'm not sure if this is the feeling you get from it though.