I think this happened with the traits change, but not sure. I use my mouse down and a forward arrow key to run, with the mouse controlling direction. So if I am fighting a champ like Rotbeard, I do a lot of running in circles around him. This has become difficult. I have to move the mouse cursor now much too far. In fact, I cant do it on one screen. I have swipe 3 or 4 times to accomplish what I use to do in one. I did check the speed on my mouse on the OS, but that did not help. I am surprised that there is not a setting in options for this.
Anyway, the travel is much too slow now. So, now I take a lot more damage. Try it. Stand still and see how many swipes it takes you to turn 360.
Please fix this. It makes a big difference if you are trying to solo things. If your zerging, so what. That is brainless anyway.