One thing to remember... is that arcade wheels are Geared. So for example,
even a small movement on my Sega Turbo's wheel translates to an immediate precise
movement of the car.
When you take that into consideration, and again, with sensitivity adjustments,
one can dial in very good control.
I really dont think it would take much for someone to get used to
vertical spinners. We have vertical dials on all kinds of equipment
already.
I understand where you are coming from. However, I tend to think that
the immediate feedback of control -vs- on-screen resulting action
will be more than enough for a person to be able to react properly to.
Much more so than say... those crappy mini analog thumb sticks
on console pads. Ugg. Poor mechanical control (bad leverages),and
reduced sensitivity, equals sloppy inaccurate control.