For the bezel rattle, it’s the tolerances on the camera and mic hard kill switch sliders.
Doesn’t bother me at all, but if you want to change it for yourself you can look into that area. If you have some parts 3d printed with tighter tolerances you could remove the rattle.
The key board key removal is a bit of a pain, I’ve done it on some Dell laptops in the past. Not a difficult procedure if you’re slow, methodical, keep track of the screws etc. There’s a chance they will strip if you use too much force since the screws are thin, yes, but they won’t strip if you are careful and can purchase the replacement screws if you do strip one, something most hardware companies don’t offer.
For the tech support side of things, see the forum post where I outlined my thoughts.