Back in May, Blizzard implemented the "Linear Ramp" option for console players that'll allow them to aim smoothly in comparison to PC players and other popular first person shooters. Unfortunately, since then, various players on the official Blizzard forums have posted complaints
The majority of the problems is that the motion of the crosshair does not start at 1% motion, but at 15% motion, affecting crosshair placement. This can be seen better if the player moves the reticle at its slowest speed. The video below is a proper video representation by YouTuber, OverThinkingGames.
In a most recent post, an official Blizzard representative responded to one of the recent posts and said that the Blizzard Engineering team is well aware of the problem and is looking for a way to replicate the problem to fix it.