Without these improvements sometimes it is very difficult to deal with users. Q2A never fulfilled them so I think PQA can do it.
1. Secondary password field at registration form to confirm password
2. Contact Us page instead of Send Feedback
3. Way to send mails to all moderators or editors or experts or all users except special users.
4. Page to showcase all moderators or editors or experts
5. Sort answers
6. Sort users
7. Improvement in mailing system because sometimes user doesn't get account confirmation mail
8. Account confirmation by admin if user doesn't get confirmation mail.
9. Facebook, Google, Twitter logins instead of just Facebook login.
10. Pinned question feature instead of featured questions.