Is gyro set to mouse, but the joystick is set as a joystick? Having the 2 different input types active at once can cause problems in some games, basically it flips between gamepad and mouse mode rapidly and doesn’t keep a consistent input between the 2.
As for actual use, I use the joystick for larger movements like turning and the gyro is more supplemental. Like I’ll use the joystick to get an enemy on screen, then rely more on the gyro to accurately aim. Depending on the game, I usually set it so the gyro is enabled with “aim down sights” from pulling the left trigger, that way it isn’t having any effect unless I explicitly want it to.
No. They have done some tests that still show it can be beneficial in some cases, results are not fully conclusive yet. That being said, it is less beneficial now since the new update does some of the same stuff cryo does.