How can we improve WHMCS?

Custom fields for additional contacts
Be able to have some additional custom fields even in user's custom contacts

To add the possibilty for costum fileds in contacts.
So, for example i can add title (like ceo , feo) for contact and know what their responsibliy and how am i talking to...

Ability to add custom field to sub-accounts
The idea is to add the possibility to add custom field to sub-account the same way we can add it to the main contact.In example, it could be useful to add a newsletter for technical sub-contact, or define if it's the secondary or third level person to contact incase of emergency, etc... It could add flexibility in the way of managing users of the same main account.