With your other complaints I don’t understand why you want to open up more cans of worms.
You’re certainly free to change shocks, tires, and wheels as you wish. However, any warranty claims regarding alignment, wheel hubs, vehicle ride, tire wear, suspension problems, and so on can be legitimately denied no matter how hazy the connection between the parts and the problem.
As to Bilsteins, if I were in the dealer shop I would refuse to install them. Why? Because I’ve worked in dealer shops where customers wanted Bilsteins installed on their new cars and were severely irritated and downright pxxxxx off when those Bilsteins failed at a young age.
In one case, I installed a full set on a 2 week old VW and one failed within 3 weeks. Two weeks later another one went and the customer had forgotten all about the warranty on labor only; we do NOT warranty a non-factory part.
Our copy on file of the repair order refreshed his memory…