They've been doing some 8am open rather than 9am on some party days to tempt guests to still go to MK. For our recent stay earlier this month, they had 8am for party days late Aug., and then didn't expand our park hours, so they were still 9-6 at MK for Mon & Fri. Pretty tough to avoid party days when it's nearly every day for you.
Like I said, I personally like something like Sun MK, Mon. EP, Tue HS, Wed MK, Thurs off, Fri AK. Since Tue Wed are your likely lowest crowd days, having EP/HS, single visit parks there, especially HS that has only about 7 attractions that get congested quickly. EP uptick on weekends for the locals coming in for Food & Wine makes Mon selection just fine. AK is the least popular park that we always stick on the higher crowd days like Saturdays. And having the earlier 8am open for AK on your last park day, Fri... if your Thurs is your day off, you can go to the pool, Disney Springs, pack in the evening and get to bed earlier to get up early Fri.