There was one minor clarification to the “modifying your LL time will not change the time you can book your next one” that I noticed on this trip.
I happened to make an LL reservation for a ride that was going to be open in like 15 minutes. The time the app said I could make my next LL was in 75 minutes (immediately after the LL would have expired). I ended up modifying it to a different ride with an LL time far off into the future and saw that the time for my next LL was adjusted so it would be two hours from the original booking. I wasn’t intending to try it but realized they guarded against that “hack”