Before I go on, let me say that I HUGELY appreciate all the effort you're putting into this. It is enormously valuable for me to see what you're doing so I don't have to make a lot of mistakes and then try to fix them. And your videos and write ups and just plain photos are really good quality (unlike what we typically see on those other forums
which helps a lot. You are my guiding star, Eddie!
So, the Mopar kit comes with slightly longer lower front control arms which are presumably just the right length to correct the caster. And bump stop extensions which presumably keep are sufficient to make 35s not rub with the stock wheels. And it was my impression that with a 2" lift the axle position and pinion angle are off by a small enough amount that it's ok to ignore.
I'm not sure why I'm so fixated on the Mopar lift. Maybe because IF I can get away with 35x13.5 tires and just that much lift and flat fenders (which I want anyway) then i'll be happy and not need any further fussing. (Suspension fussing, that is, of course, i'll be replacing the bumpers etc.) i'm not too concerned (for now at least) with trying to get more articulation.
What I am concerned with when choosing between 35s and 37s is the street performance. Not so much the ride quality as with cornering. I can get by with some harshness but I hate body roll and vague steering. My other car is a Tesla Model S which despite appearances handles amazingly well (mostly due to its very low CG). Obviously, the JL isn't going to be anywhere near that level but it would be nice if I can run 37s and still be a little better than my JK with 35s and a budget lift.
One more question, which I think as alluded to before: your EVO lift doesn't correct the left/right axle position. Presumably that means your thrust angle is off a little. Do you notice that? Are you planning to fix it? Or should I stop worrying?