When we shared subfolders, the hierarchy level didn't transfer.
Shared projects don't necessarily need to follow the original hierarchy. The project is shared but each user can organize it however they like.
That not make sense. If I have a Project Folder and I want to share with someone, I intend to share the sub-folders with this hierarchy too. In all my cases, I dont have tasks inside project folder, but only in sub-project folders. In the other hand, if I want to share only the sub-project folder, I select just this one. Please, this feature is very important for a good control of project.
Thank you for your feedback, we'll consider adding such option in the future and you're welcome to vote for this request in our Votebox: https://todoist.com/Vote/show/7644/