This most definitely should be a feature request because there is no reason that the mostly-useless tiny programmable joystick on the lower right side of the front of the controller couldn't be programmed to control the gimbal. This would be MUCH better than the awkward and unreliable (tough to get it started) touch & drag method on the screen.
If there is a way to request features that would actually get back to DJI, this would be a good one.
I personally don't have any problem getting the touch & drag to work (smart controller) but admittedly I don't use it very often. It would be neat if you could program the right hand tilt switch to do that, since you don't need it for exposure changes in many video situations.
I set the joystick to drop the gimbal to 90 degrees or re-center the gimbal, and I do use that a lot.