Agreed. AK is a half-day park if you only care about rides, but it has sufficient content to carry you for the full day if you explore the trails, safari, etc. In terms of holes and attractions in dire straits, it has the fewest gaps of all the parks. What each really needs, IMO:
Animal Kingdom
Replacement: Primeval Whirl
Refurbishment: Dinosaur (minor)
Nice to have: Avatar expansion based on upcoming sequel(s), re-work of Planet Watch
Magic Kingdom
Replacement: Stitch's Great Escape
Refurbishment: Entirety of Tomorrowland (major), some classic Fantasyland attractions (minor)
Nice to have: Previously planned enhancements to Big Thunder et al, even more capacity via an expansion pad
Hollywood Studios
Replacement: Voyage of the Little Mermaid, or just the Animation Courtyard in its entirety
Refurbishment: Sadly, Rise of the Resistance; your premiere attraction tied to your overpriced faux cruise should function perfectly
Nice to have: Even more attractions in Galaxy's Edge, Toy Story Land, or the Echo Lake area
EPCOT
Replacement: Imagination
Refurbishment: Spaceship Earth (major), interior common areas of World Nature (minor)
Nice to have: More World Showcase attractions or pavilions, utilization of PLAY! theaters