The users listed in /people are sorted in descending order by creation date. If you happen to be bad in remembering names, that doesn't really help in finding users.
The more natural "order by name" is missing in the UI. I think there are at least two good ways to implement this, one would be to create a selector similar to that one present in workboards which, if selected, would always present the users in this specific order. The other option would be to improve the advanced search in the People app to accomodate for this and then we could just save the query.