It was a dive but then they added the heatseeker tackling if you held the button. I would still play friends and they would just be diving left and right trying to "tackle".
Oh of course, the cone is purely visual. It's just helping people aim their ball carrier and square up when they tackle. I don't think the mechanics will change BECAUSE of the cone but if those are the changes they usually don't advertise. Mostly because that's admitting that they knew the ratings were broken in the first play.