Yo, why cant they just gather ALL the textures and props, put them in one folder, name it the massive texture and prop folder containing the latest texture and prop, and download it, and as the new ones come out, they tell you wich ones to delete.
Itll help alot of people, and itll save people time from having to organise it. They open the folder, serch for the texture or prop told to delete, and tada. Ones deleted, download the new ones, and yall good.
That would save people from the dependencies. Now for the other downloads, make a folder with the type of building you downloading, under that folder, the name of the artist, and under that folder, his download, because there isnt no way to get that fixed, unless they took the time to bundle all their buldings and stuff into another folder, and allow you to choose wich buildings you wanted before you install it. Kinda like the NAM when it allows you to choose. Its complicated to explain, and very long... so i would rather let you be creative and figure it out lol, but hopefully yall know what i mean.