I've had good experiences with independent porsche specialists for diagnostics. They often charge less and can be more transparent. Maybe worth exploring that option?
Dealing with dealerships can be a pain. Have you thought about using a car broker? They might have better connections and could save you some headaches.
Congrats on the new ride! I'm curious, how does the Taycan compare to your previous EVs, especially the Lucid Air GT? I've heard mixed things about Lucid's reliability.
I've heard some people say the lane departure warning can be affected by road noise. Maybe try testing it on a quieter road? Just an idea, not sure if it'll help.