I'm saying that using a car with a lot more downforce, you feel road bumps a lot more and therefore there should be a lot more oscillation. Take a look at a Mclaren GT3 video, same car also used in the video. There's nowhere near as much oscillation compared to your indycar. You are just comparing two totally different things. (it is like saying that game physics is wrong because bmw z4 road car in a game doesn't seem to have as much grip as z4 gt3 in real life - two totally different cars)
It is just useless to complain about things you may not know. They have had almost a year after ISR tested it to develop it. You sound like what you see in the video is what you get and there has been no actual development after the video made. Just wait for a reviews when this wheel is on sale and you still see that it's FFB is fundamentally wrong then come and complain again.