The current interface is poor. When creating custom user properties and setting the privacy to everyone, the "can user edit..." field becomes read only and you have to save and go back into the property again to set the field.

The property re-ordering mechanism is terrible and limits where properties can be placed. Properties should be able to be places under any heading.

Finally new sections should show up on a users profile page instead of coming under the heading of "More Info". A number of our clients require this feature.