Ha, even though mine was still under warranty I was specifically told that 'alignments' are not covered under warranty.In my case the warranty covered the cost of re-alignment, although I had few other issues also come up.
I also made the mistake of adding WDH for first two trips but I switched to using these two
The CURT RockerBall™ cushion hitch provides improved comfort and enhanced control while towing, featuring our unique ShockDrop™ technology. An integrated cushion isolator allows the hitch ball to turn the standard ball mount into a cushion hitch with anti-rattle capabilities. The RockerBall™...www.curtmfg.com
I put mine in the raised position as my trailer is off road editions and is 3 inch above. Although the manual says the hitch must be in drop position, but if you look at every safe towing guide, it insist that the trailer and vehicle must be level as possible.
In regards to the auto disabling, I find all the lane assist features gets disabled as soon as the car detects the trailer. I will need to check of front assists gets disabled or not.
I have a similar reciever but use a standard ball. Agreed that it's important to keep the vehicle and hitch as level as possible. I've also considered some airbag inserts.
Trailer is parked for now so something I'll look at come spring time.