The editing process for Contacts is VERY cumbersome. I would love to see a full screen listing of the contacts where I can edit each, right there, or delete, etc. Having to delete or edit after pulling just that contact up is very pain staking when you have 20 or so to manage (edit or delete).
And the lists don't save the changes I make. I select the list, edit, then delete and when I go back to the listing of Lists it's still there. And removing the contacts from the list first has no effect. I'm assuming it is not an immediate change, but there's no way to know if I was successful or not.
Lastly, being able to edit contacts, as described above, based on whether or not they have an email address (a sort/filter feature) would be wonderful.