Just a thought here. On my 2016MX and my 2015 85D, we had a nasty front end vibration under hard acceleration. When it 1st happened, they recommended keeping the cars in "low" to see if the problem was alleviated. It did in fact help.
Since then the half shafts were replaced twice on the MX and 3 times in the MS. The problem was finally resolved after who knows how many iterations of the half shafts. This was 2-3 yrs ago.
I since sold the 85D and replaced it with the plaid. I always run the plaid in low, cause I like the stance, but I think maybe it might affect the "vibration" people are experiencing with the plaids. I have never been able to replicate it following the posts recommendations to do so. My car has over 7k on the clock.
So my question to you all with the vibration; does it change by lowering the car?