Personally, I think that there is more to do at AK. That is until Galaxy's Edge is complete.
AK:
Discovery Island Trails
The Tree of Life
Flight of Passage
Na'vi River Journey
It's tough to be a bug
Gorilla Falls Exploration Trail
Wildlife Express Train
Rafiki's Planet Watch
Expedition Everest
Festival of the Lion King
Kali River Rapids
Dinosaur
Maharajah Jungle Trek
Finding Nemo - The Musical
All the carnival rides in Dinoland
River of Lights
Kilimanjaro Safaris
Hollywood Studios:
Star Tours
Indiana Jones
Frozen Sing-Along
Launch Bay
Muppet Vision 3D
Toy Story Mania
Voyage of the Little Mermaid
Walt Disney Presents
Twilight Tower of Terror
Rock-N-Roller Coaster
Beauty and the Beast Show
Fantasmic
Many consider AK to be a full day park now. Hollywood Studios is considered by most to be a half day park until all the renovations arte done.
I will definitely miss Flights of Wonder, I hope they don't destroy it with the new version. There are more awesome attractions right now at AK. My personal favorites are Expedition, Finding Nemo, Maharajah Jungle Trek, Kilimanjaro Safaris and Flight of Passage.
With that being said I personally like Hollywood Studios better, even with all the construction going on. I love the feel of the park and my favorite ride anywhere is TTOT. I also still really enjoy Voyage of the Little Mermaid, Beauty and the Beast Show, Muppet Vision 3D and Fantasmic. I also like to just walk around and see the street performers and listen to the back ground music.
So it depends on what you like best.