Hi gress,
you are right, you can indeed control this effect very exact, but it takes soo much time to build all those effect memories...
Using the effect engine is "working economic" as the only thing to do is push wheel group button twice and alter Effect to "ellipse" and tilt to i.e. 50 press wheel button again alter speed to i.e.10 and volila you can safe this motion to a pallet.
Special hint: to create up to 4 other effect on this basis
press and hold position button alternate the "edit mode" to "fan-first" "fan-middle" or "fan-last" then change the value of "offset" to i.e. 45%
Other choose all even devices and change speed to i.e.+10 then choose all odd devices and setup speed value to -10