How can we improve WHMCS?

I just want to give specific password validation for client register page. For example the ability to suggest or impose requirements on what type of password a user can choose, such as:

1. the use of both upper-case and lower-case letters (case sensitivity)
2. inclusion of one or more numerical digits
3. inclusion of special characters, such as @, #, $
4. prohibition of words found in a password blacklist
5. prohibition of words found in the user’s personal information
6. prohibition of use of company name or an abbreviation
7. prohibition of passwords that match the format of calendar dates, license plate numbers, telephone
8. numbers, or other common numbers.

I want to implement all these validations and force user to enter such a strong password.