For instance take the 3 pieces of concept art we have for Fantasia Gardens so far
And take the options we have for the entrance
Attractions
Disneyland Railroad (featuring the Rite of Spring) - A-Ticket
Horse-Drawn Carriages - A-Ticket
Ave Maria Walk-Through - B-Ticket
Firebird Suite Walk-Through - B-Ticket
Restaurants
TS - Concert Hall
QS - Bacchus's Winery and Mediterranean Bites
QS - Jaccus's Fruit Cart
QS - Yo-Yo Flamingo Ice Cream Shop
QS - Rhapsody in Brew
Shops
Dance of the Hours
The Steadfast Tin Soldier
Pines of Rome
Toccata and Fugue
Carnation Gardens - Flower Shop
Entertainment
Ballet Dancers - walk-around
Pomp and Circumstance Donald/Daisy - walk-around
Meet the Soundtrack - little Fantasia intermission with an anthropomorphized sound line
Piano and Drum Trolley - walk-around
Flamingo Pool - real flamingo pool similar to Disney's Animal Kingdom
Clair du Lune - Features herons in the Florida everglades
Many of them are inspired by the natural beauty scenes of Fantasia. A mix of Greco-Roman designs as well as naturalistic coves that can take inspiration from the film can be the cohesive designs for the shops/buildings.
Several of the quaint shops can be built into the natural settings in the gardens and/or built in to blend with the commonplace greco-roman building designs scattered throughout the land.
The only shop I could see causing a bit of an issue is the steadfast tin soldier, however, perhaps that could be attached in the concert hall or within the Fantasia Castle, rather than out in the Gardens.