Self updating userlist
You always have to manually update the userlist in the backend to see if there are new registrations. It should update itself ajax-like.
More flexible image fields
I would like to set for each image field seperately if the user can generally upload, upload on registration, use the gallery etc.
More security
It would be good to be able to better secure uploaded content. This could be done by defining an additionally secure path, which is for example only accessibly by administrators.
In my case I would like to have a path, where user uploaded content is stored, but which is only accessible for administrators from the backend. So it cant be accessed by typing it into the browser for regular user.
More administration for users
I am missing an access level "self" for fields that are only visible for the owner of the profile.
More layot flexibility from frontend for users
There is this JSPACES component:
ninjademos.com/index.php?option=com_content&task=view&id=29&Itemid=68
It gives users the ability to style their own profiles to their likes. So every single profile looks different. That would be awesome. Users could set colours, backgrounds etc.