I'll let mist chime in as well, but, the new default sounds terrible (i.e. low sensitivity and then it jumps to high speed). I'm not sure why some console game developers think they need to add that much of a crutch when in the end it'll feel awful due to it's unpredictability. Let alone change the default on people (which I've been reading?)!
Any serious velocity jump is bad -- for everyone (controller or mouse). They followed Halo 5's model but ignored all the backlash from that community which resulted in them adding settings to revert it. Yet Treyarch, IW, and DICE figured out how to craft a controller aiming system that's consistent, predictable, and functional for all console gamers. It seems that Blizzard isn't that level of developer nor understands the console platform.