Honestly, in a situation like that, there is not much one can do... if you have no shelter, in an EF-5, basically all you can do is hang on and hope for the best. when winds reach 295mph,, nothing except a shelter is going to be of any use. Advising people to get out of the path? well, honestly, if it were my family, and we had no shelter, I would definitely be trying to get out of it's path as well..
That reporter/weatherman was put into a no-win situation. Getting int he car and trying to outrun the storm, is the wrong choice for anyone not trained, and can be the wrong choice even for those who ARE trained (as Tim's death demonstrates)... But, without shelter, I would say take your chances on the road. The problem is, MOST tornados are quite survivable by the guidelines given of sheltering in an interior room, etc etc. At this time, there is no way for the wind speed int he tornado to be determined at the time of the sotrm, aside from visual estimates, which can be WAY off. All information on wind speed is gathered by the NWS AFTER the storm, by analyzing debris. That is actually one of the points of research many chasers are doing, developing a way to measure the wind speed in real-time.
SO, with all that being said, I suppose in the end the proper choice, would have been to shelter in place, since almsot all of the time, that would be sufficient.. although in this case it would have done no good at all...
As I said, no-win situation. Either side can be argued with validity.