GE itself is a very impressive land physically when it comes to size, buildings, rock-work, etc, but it is very hollow because Disney has neglected to fill it with any heart or substance. Just some droids and walk-around characters would do wonders. A shift to the OT era would also allow more characters to be present as it can cover some prequel content as well like Maul.
Avengers campus has exactly the opposite issue. It has lots of characters and kinetic excitement but the physical land itself is below subpar. Boring architecture, it’s small, no worthwhile rides IMO. With GE, they took what was built to be a strong land and refused to fill it with any of the extras that give it substance. With AC, they took a subpar, under-built land and flooded it with the ‘extras,’ seemingly thinking that’s what would save the land.
AC is built like an ice cream sundae with a spoonful of ice cream and 5 gallons of whipped cream.