Ok, I am going to try to put my thoughts together here...
Day 1 - I would say do the few things that are left open at Studios. I figure if you have FP+ for those you may be able to finish this park up for the trip. Otherwise, just pick which park makes you happy and makes you "feel" happy that you are in WDW even if it is for just a few hours. For me, that is MK. I would NOT do
MNSSHP on this day. You want to be very rested and stay as late as possible for this
Day 2 - First, Cape May is fun! But if I recall, you were hoping to try and get a CRT ADR for this trip...keep trying. But I think your plan of going to Cape May (either cab or bus to HS, then walk or boat if running to BC) What about going back to HS and taking a bus to the Contemporary and doing a monorail loop and browsing or visiting the monorail hotels. Or I say pool time if weather is permitting. I do think you want to rest before heading to MK for the party. You want to make the most of this ticket. I would say eat dinner before you go or right when you get there if going early. Do not spend party time eating dinner. Last time I went, there were no special treats (other than the Halloween Candy) but that was 7 years ago. Maybe someone answered your questions regarding this and I have not read it yet!
Definitely do not miss the parade or Hallowishes...and catch it at the park. Even if you want to beat some of the crowd out of the park, catch it near the train station, that way you can beat some of the crowd out. I myself prefer to hang around, get a snack and relax while everyone else crowds onto the buses
Day 3 - I think you have solid plans here. Is HS second recommendation and not Red on Sunday? If yes, I would probably just flip the days. Also, you might want to check out Beauty and the Beast...wait is it closing too? So many closures in this park, I can't remember. But it is a really good show! I know the Animation Class will be closed (will it have moved to someplace new yet?)
Day 4 - AK - Definitely study a map for this park! It is HUGE! You want to have a plan of attack and not be crossing the park over and over a again. For lunch, I would do Flame Tree (although I have yet to try it!) I was not a fan of Yak & yeti QS, although I have heard good things about the TS. I LOVE FOTLK and Nemo...can't go wrong with either of these or both!
Day 5 - EPCOT - I would get FP+ for Soarin and Spaceship Earth. Then maybe do the third one for either Turtle Talk with Crush or the Character Meet and Greet. I would not use it on Figment or Nemo...and I LOVE Figment, but both normally don't have waits and if they do, they are fast loading rides. Do the PICK A PEARL in Japan! Both of you! Best ceremony ever! It was sooooo much fun! Also, show your daughter the store in WS online to peek her interest in visiting there!
Okay, will stop here for the night...who knows...you may have totally changed strategies in the next 20 pages! LOL!