To be sure, just take it to your dealer to have them realign it. It needs to be calibrated properly. You can also DIY it if you want since it's in the manual.
I think the wiper thing is normal for aerodynamics. For the rattles, haven't experienced it on mine. Try pushing the panels/pillars to see if it goes back to normal, maybe there's just a slight gap.
I also have an unusual spot on my windshield, but it's a little smaller. I'm sure if you tell Tesla about it, they'll say it's fine, but I don't believe it's normal.