Just my 2 cents, but before anyone says you cant wheel hard on spacers and 35s, I would look up Litebrite on YouTube. They've done a lot of things on basic mods that most people would say you couldn't do. Now the JL Sport axles are definitely not as strong as the Rubicon axles, but until it...
Yes the probably could Wi-fi the vehicles and do it in your house.... but then the dealerships don't get to service charge you for it. Although FCA could possibly charge more for a subscription to update your car.
I looked... and now I wish I hadn't. There are so many people posting about working double shifts (20 Hrs) that I now understand why random pieces on my JKs rattle and shake...
The previous go to answer was that the cross-member that the hitch is bolted to is the leading factor of the low tow rating. That tied with the "off road tuned" springs/shocks and smaller disc brakes combined to create the lower rating.
The Wrangler is very finicky IMO about trailer...
Jeep has already stated that they looked at the rain sensing wipers and found some interference issues with the fold down windshield during development. The alternative would be to remove the fold down feature from the Sahara. However, there are many people who buy Sahara's for the features...
The cluchless start was an automatic thing on the JK's. You didn't need to hit a specific button to do this. I haven't seen anything like that in the images for the JL interior so I imagine its the same way. That being said, I don't know how it works with the push button start on the JL.
In the JK the Hill Start Assist is a feature you can permanently turn off. I havent used mine in years. I'm assuming this is the same with the JL. It is a nice feature at times and on my JK it varies the amount of time held based on how hard you push in the brake. A light brake to just...
If you're willing to wait, or want to upgrade later, I'm sure all the manufacturers will have some nice step/sliders available. The JL is not that far of a leap from the JK and wont take long to modify the JK versions for JL use.
JCR and ACE already have a bunch of items available for the JL...
The 2 inch lift will be fine for 35's. Because of the slightly taller springs (this may not be fact as I haven't seen a direct comparison yet) and the much higher fenders on the Rubicon, you can run 35 inch tires stock. A 2.5 inch lift on the Rubicon will allow for 37 inch tires.
Side note...
The Hot Head Headliners are fairly simple for installation. It uses the 3M sticky tape so I imagine it will stick just fine to the Line X or spray can. If you want to get really fancy you can coat with automotive soundproofing sheets, then paint, then cover with the hot heads to seal it all up...
If you notice, they are running 37" Nittos on all 4, the spare is on a different rim and "looks" smaller than a 37. On first glance it looks like a 35" Duratrac, but its hard to tell with the low res.