I would prefer the section title to be aligned with the section text.
I’m not convinced by this. The Create button is not used only to create child pages. Why would we prevent the user to create a blog post (in the blost post space) or a meeting note (in the meeting notes space) directly from the user profile page?
Would be nice to enable inplace editing for the user profile preferences instead, i.e. to be able to edit separately each preference, directly from view mode.
In your screenshot the sub-sections have, conveniently, the same height, more or less, but we don’t know / can’t have any expecation about this. So I’m not sure how this is supposed to work with sub-sections that have significant variation in their height.
The rest of the proposal looks good to me.
Thanks!
Marius