Exactly this. Our last trip, the only time one of my kids had a meltdown was the day we did HS from 8 am - Fantasmic. It was just too much. So this trip I was planning on spending the morning at HS and then some other evening hopping over to catch the fireworks. Our trip is 6/24 - 7/4, so the only days the fireworks are scheduled are 6/26 (morning EMH) or 6/29 (our hotel transfer day, so we won't be in the parks). I've switched our HS day to 6/26, giving up a ppo adr at Akershus in the process, but it makes me nervous to have no back up nights available. Right now I have AK scheduled on 7/1 (a Friday) and Epcot 7/2, but I'm debating switching them so that if the new fireworks are only on Sun/Wed/Fri in July, we would have a chance to see them after Epcot. I'll probably wait until 5/20 to see what else they announce, but I also know the longer I wait the harder it will be to switch those 2 days worth of FP. Thankfully we don't have any critical ADR those days.
I just got a survey while using Disney's website. I gave everything good marks except for ease of finding park schedules and attraction/entertainment times. It asked me to type why, so I said lack of schedules for Star Wars fireworks, JB, and FEA were making it hard to plan. I'm sure at this point I'm not telling them anything they don't already know...