It looks like there is tilt. But there pictures in the article do not show the top view of the 8A piece. That could be the rotational piece?
I think it has some rotational component. There are two left-right-arrows called mb and mc (m for motion?) and one up-down-arrow called ma.
Using mb and mc coordinated (in one direction) + ma you have xy shifting
Using mb and mc in opposite directions (e.g. mb to the left and ma to the right) you have a rotation
Combining both motion types you can counteract any type of rotation and shifting (within the limits of the acceleration sensor / electronics / actors).
Tilting the sensor is IMO not very helpful because it changes the focal plane. Maybe interesting in macro where you can do some tilting but I think the majority of cases will be done first!