I've noticed a vibration on steering wheel when my model X (2016 p100d) traveling at higher speed. Basically start to feel that around 70mph, at 80mph it becomes a lot obvious, shaking hard at 90mph if I really push it.
I brought my car to Tesla Fremont along with some other issues and they did a tire rotation and wheel inspection for the first time. The vibration was still there.
The second time I took it to Fremont Service and they told me they will not do anything about it.
The service advisor told me I'm not legally suppose to drive over 65mph, and they don't care if the issue happens over 65mph since they cannot duplicate it. That's what they wrote on my service invoice "TESLA DO NOT GO PASS 65MPH"
I have seen a few threads with similar concerns and they eventually got it fixed. Not sure how they managed to do that.
I have seen service quality deteriorates over the past few years, from they will goodwill a lot of things on my Model S to they will tell you everything is normal to they don't care nothing at all.