I’m new at developing and using touring plans, but I started VERY early for a trip in September 2022. Some of my plans had large time gaps in them - 2 or more hours between attractions. One FAQ said to reduce the end time. But that would not work for late events such as MK fireworks or EPCOT’s Harmonious.
I discovered that simply reoptimizing the plan - with more current data - improved the schedule, reducing or moving gaps. Also, a couple of tweaks in lunch break timing helped.
What I’ve learned is that I will need to revisit and update my plans closer to my trip - at least 2 weeks out.
I suspect most people here already know this, but I’ve learned a lot just by checking.