N54: E90 rear trailing arm bushings/bearings

I have seen some people go to great lengths to try and get the straight line acceleration dialed in on the e90 chassis, but I generally see people ignore the trailing arms, or if they do the trailing arms, they keep the soft stock bushings.

It seems to me like a stiff bearing to hold the trailing arm would help keep the toe in check during hard acceleration, as having an upgraded toe arm by itself cannot prevent toe change of the wheel carrier.

I have only seen one offering for this, which is the bimmerworld toe arm bearings.
Is anyone here running them?
https://www.bimmerworld.com/Suspensi...ing-Set_2.html

I have ordered some for myself, but I am planning to change several things in my subframe at the same time, so I will not be able to identify specific effects of just changing the trailing arm bearings.

Any thoughts on why they would not be a significant value for people interested in straight line handling on this chassis?