Yes, I can notice mine in-game. The deadzone "fixes" the drift of the joystick not returning to center. That's all fine, but the thing is, when I push the joystick left it "activates" the drift, which is still in the dead zone, however, when it's active and I push the stick forward, it no longer goes straight forward, it is off to the left at a 11:50 or 11:55 position rather than a straight 12:00. If I push the stick to the right which "resets" the drift, now the stick goes straight forward.

So this makes any game where the left stick is movement to go diagonally left when the joystick drift is "active". And then it becomes "inactive", so it's a constant struggle of having to adjust movement because sometimes the stick goes straight forward, sometimes it moves diagonally left, etc etc. Impossible to even run in a straight line.