So, as an addendum to the recent D&D Next column, there's a
Q&A. In which they rectify the fact that they only spoke about spellcasters changing with tiers of play, by saying that was what the column was about. And then they tell us how fighters will get awesome, too. They get the ability to "shrug off spells and other effects", and then "increase fighter survivability and the ability to cheat death".