Nice, I’ll get you added to the list!
In my experience, the three hours does go by very quickly. I didn’t make a plan - not sure if one is really needed unless you’re just an uber planner.
What’s hard to plan for is rides you may want to ride multiple times. We would somewhat randomly do things multiple times when the mood struck and/or it was easy to get back on. Three rides on Splash all of a sudden eats a bunch of time!
As far as the park clearing quickly... 2/8 is an 8-11 DAH night. HEA is scheduled for 8PM. I think this tends to help DAH guests because 1) a lot of day guests will be gathering in the hub well before 8PM to find a spot to watch, which naturally clears people from rides... and 2) people tend to leave right after the fireworks since they can’t do anything else.
While there certainly is some crossover time in that 8-8:45ish range, I didn’t find it bad at all on my day last year.