I am unaware of any market research. Quoting a guy or two is not reliable. One could just as easily quote a person like myself, that would absolutely want one. Well known sports/wildlife shooters are a miniscule representation in the market. In fact, I can't name a single famous sports/wildlife photographer, or wedding photographer for that matter. When it comes down to purchase time, I get what I want. When it comes to design/manufacturing/marketing, Canon will do what Canon believes will sell best at the highest profit... no matter what their sponsored or unsponsored endorsers want.
Anyway,a guy named Scott Kelby shot a college and pro football game. Here's what he had to say about it. "So, they added some touchscreen technology for when you’re shooting video, but the screen on the back isn’t a touchscreen for anything else. You can’t choose menus by touch, or swipe through images, or pinch to zoom with touch, and so on like you’ve been able to do for years now on their old 70D model. I understand not making an articulated screen like the 70D (though that would be fantastic for shots of the coaches shaking hands at the end of the game, or the coin toss, or team huddles during warmups), but I just don’t get not including a full touch screen. I know some high-end pros might make a fuss about a touch-screen not being as durable, but not everybody buying this camera is a high-end pro. I think given a choice, most folks would opt for the touchscreen version."
Unlike Kelby, I do not get not having a fully functional articulated screen.