If they could fix the time selection part to not change mid transaction. Along with allowing replacement of an existing LL without having to remove the current one first, do it as a single atomic transaction.Rolling back to the old product isn't going to happen. More substantial changes will come next year but they are still very much figuring out what that looks like. Ideally, it would give resort guests a much bigger advantage.
Those two things, along with the capacity limit being done would go a HUGE way to making it better.
I was never a fan of the "plan it out two months in advance", so not having that isn't a big deal. I now detest the park pass requirement and hopping restriction just as much.