I do agree a lot of places flooded that don't tend to flood. And it was fairly obvious to those who followed this system closely that it would happen too. But for whatever reason, that risk was not communicated effectively to the public.
I know we like to get on here and criticize models when they aren't exactly right, but in general they do a pretty good job. The biggest hurdle in weather forecasting continues to be the communication of the science so that members of the public truly understand when they are at risk. IMO, that area of meteorology needs a lot more research vs throwing more money at numerical weather prediction.