You canāt expect eye tracking to work like a regular head tracker. With accumulative mode, youāre very limited with your yaw settings. Any more than, say, 45-60 degrees yaw, will rob you of any accuracy. Either that or itāll take you way too much time to change the view position. The snapview mode is even more limited as per its purpose.
Iāve tested an eye tracker with a friend, using various gain options to get a decent and fast view all around. This isnāt possible with the accumulative tracker. For example, I was running in Arma 3 while trying to keep the view of a rock. In the end I lost the rock and wasnāt sure as for which direction I was looking at anymore.
Look at Tobii demos for Elite Dangerous and see what kind of experience the hardware grants. Iād say itās promising for civilian flight and overall slower experience, but games requiring fast reflexes and multitasking arenāt suited for that.
Tobii eyetracker support for opentrack is high priority but I got less and less time for the project. However, from private tests I can already tell you that you wonāt get the same kind of experience as a regular head tracker.
Another solution may be controlling traditional F4 snapviews with the eye tracker. Of course this doesnāt give an experience comparable to regular head tracking.