Agree that it looks good. The 7DMT queue is a lovely place to be standing around but I would definitely hit it early. Last time we were there, it was the only line that didn’t lessen as the day went on. Through the castle then to the right or to the teacups and swing left. Either way. Then would probably hit Peter Pan and Small World. Winnie the Pooh can be done earlier or later but is a nicer version than DL. HM is right next to SW though so I would probably save Winnie for later (it’s usually 15-20min in the late afternoon).
Then is it Space or Splash? With a 5yo, I would probably go splash. Then you play it by ear but commonly BTMRR (if it’s open) has shorter lines in the afternoons.
In Epcot, I would hit Frozen shortly after arrival then take your time from there. I haven’t been back to Epcot since corona so I don’t how it looks under construction but entering at the international gateway will mitigate that effect.
I would recommend if possible that you book SciFi for your first day at HS. That way if you get your fill there on day 2, you’re free to choose another AK/MK or Epcot day. With your kids, HS will probably have the least to offer them -especially without the shows *but if they are doing the Frozen sing-a-long and you’re looking for something to do, it’s cute* and Star Wars aside (which you have at DL) it’s not that rich of an environment. We really enjoy it, but it’s more of a teenager park to me.
The bus to Kidani for Sanaa should not be bad. We love Kidani village and have never had a hard time getting to AK from there.
If you find the skyliner as convenient as I would expect, you can take the bus from WL to HS then take the skyliner to CB *if they’re all still running*. At some point they stop bus and skyliner service so if dinner at WL goes too late, you could be needing Uber. Similarly, skyliner to HS to bus to AKL could be easier than bus to AK to AKL depending on where your room is at CB. Just options.
Hope it works out for you!