Some, sure. All, not even close. And how is WotC going to tell if a rando person on a survey is a martial player or a caster player, beyond self reporting? In our group, and several extended groups in our area, all enjoyed the balance and options of the "complex" fighters and other martials. 5E does some really good stuff, but there's a lot of throwing the baby out with the bathwater. But sure, even if there's a need for simply fighters, that doesn't mean they have to be subpar. Which they are, currently.