Best way to optimize 3D objects saved as gltf

Hi Iabris, “after” file in Blender is made with Blender 4. I understand your sugestion to using well made 3d art, but anyway, could you open my after file and give me your opinion?
I’ve decimate the meshes, I’ve join the meshes into one, I’ve baked the materials…
What else do you suggest?
Also here the final glTF file: casetta_piccola09.zip - Google Drive
Thanks